All Courses
Explore Courses UPSC Exam UPSC Test Series Free Notes EduRev Infinity Get the App Login Join for Free
Sign in Open App
CAT Exam  >  CAT Questions  >   Use following information to answer the ques... Start Learning for Free
SaveJoin the Discussion on the App
Use following information to answer the questions.
Keshav and Kamal know that their boss Mr. X’s birthday is one of the following 10 dates:
May 3, May 6, May 9
Jul 3, Jul 7
Oct 1, Oct 6
Nov 1, Nov 2, Nov 9
Mr. X told Keshav only the month of his birthday, and told Kamal only the day. After that, Keshav first said: “I don’t know Mr. X’s birthday; Kamal doesn’t know it either.” After hearing what Keshav said, Kamal replied: “I didn’t know Mr. X’s birthday, but now I know it.” Keshav smiled and said: “Now I know it, too.” After looking at the 10 dates and hearing the ongoing comments, the intelligent administrative assistant wrote down Mr. X’s birthday without asking any questions.
So what did the assistant write?
  • a)
    May 3
  • b)
    Oct 1
  • c)
    May 9
  • d)
    Nov 2
Correct answer is option 'B'. Can you explain this answer?
FREE This question is part of
Download PDF Attempt Test
Download PDF Attempt this Test
Most Upvoted Answer
Use following information to answer the questions.Keshav and Kamal kn...
Keshav has the information of Month only not day but it can be easily seen that except Jul 7 and Nov 2, no other date has same days i.e. 7 and 2. So Keshav can be confirmed 'that Kamal doesn't know' is possible only if month is not Jul or Nov.
From Keshav’s first statement, it can be concluded that month must be May or Oct only as in other cases Keshav can’t be sure that Kamal doesn’t know it.
Now Kamal says that he knows it. That means day cannot be 6th, i.e. it has to be 1, 3 or 9 only.
This time Keshav said smilingly that he also knew it, that means month should be Oct, otherwise he must have been unable to identify the correct date.
Thus Mr. X’s birthday is on Oct 1. (B)
Free Test
FREE
Start Free Test
Start Free Test
Community Answer
Use following information to answer the questions.Keshav and Kamal kn...
Given Information:
- Mr. X's birthday is one of the following 10 dates: May 3, May 6, May 9, Jul 3, Jul 7, Oct 1, Oct 6, Nov 1, Nov 2, Nov 9.
- Keshav knows the month of Mr. X's birthday, and Kamal knows the day.
- Keshav initially says he doesn't know Mr. X's birthday, and Kamal also doesn't know.
- After hearing Keshav's statement, Kamal says he now knows Mr. X's birthday.
- Keshav then says he also knows Mr. X's birthday.

Solution:
To find Mr. X's birthday, we need to analyze the statements made by Keshav and Kamal.

Keshav's Statement:
Keshav initially says that he doesn't know Mr. X's birthday, and Kamal also doesn't know. This means that Mr. X's birthday cannot be in the following months:
- May: If Mr. X's birthday were in May, Keshav would know the exact date since he knows the month. Therefore, May can be eliminated.
- Jul: If Mr. X's birthday were in July, Kamal would know the exact date since he knows the day. Therefore, July can be eliminated.
- Nov: If Mr. X's birthday were in November, Kamal would know the exact date since he knows the day. Therefore, November can be eliminated.

Remaining Dates:
- May 3, May 6, May 9
- Oct 1, Oct 6

Kamal's Statement:
After hearing Keshav's statement, Kamal says that he now knows Mr. X's birthday. This means that Mr. X's birthday must have a unique day among the remaining dates. From the remaining dates, only October 1 has a unique day (1st). Therefore, we can conclude that Mr. X's birthday is on October 1.

Keshav's Confirmation:
After Kamal's statement, Keshav says that he also knows Mr. X's birthday. This confirms that Mr. X's birthday is indeed on October 1.

Conclusion:
Based on the given information and the statements made by Keshav and Kamal, the intelligent administrative assistant can confidently write down Mr. X's birthday as October 1.
Attention CAT Students!
To make sure you are not studying endlessly, EduRev has designed CAT study material, with Structured Courses, Videos, & Test Series. Plus get personalized analysis, doubt solving and improvement plans to achieve a great score in CAT.
< Previous Question Next Question >
Explore Courses for CAT exam

Similar CAT Doubts

Use following information to answer the questions.Keshav and Kamal know that their boss Mr. X’s birthday is one of the following 10 dates:May 3, May 6, May 9Jul 3, Jul 7Oct 1, Oct 6Nov 1, Nov 2, Nov 9Mr. X told Keshav only the month of his birthday, and told Kamal only the day. After that, Keshav first said: “I don’t know Mr. X’s birthday; Kamal doesn’t know it either.” After hearing what Keshav said, Kamal replied: “I didn’t know Mr. X’s birthday, but now I know it.” Keshav smiled and said: “Now I know it, too.” After looking at the 10 dates and hearing the ongoing comments, the intelligent administrative assistant wrote down Mr. X’s birthday without asking any questions.Mr. X later confessed that information provided by him to Keshav and Kamal was incorrect and he simply wanted to check the reasoning ability of his employees. But he told that whatever birthday you have inferred from previous information have same sum of month and the day as in the actual birthday. He also informed that his actual birthday is one of earlier mentioned 10 dates only. What is the actual birthday of Mr. X? (Assuming Jan = 1, Feb = 2, Mar = 3 and so on Dec = 12.)

Answer the question based on the passage given below.People with higher intelligence test scores in childhood and early adulthood tend to live longer. This result has been found among people from Australia, Denmark, England and Wales, Scotland, Sweden, and the United States. In fact, it has been found within every population that has been studied. Indeed, the impact of intelligence on mortality rivals well-known risk factors for illness and death, such as high blood pressure, being overweight, high blood glucose, and high cholesterol. Its effect is almost as important as that of smoking. Differences in human intelligence have environmental and genetic causes. An intelligence test score in early life ispartly a record of what the environment has wrought on the brain and the rest of the body up to that time. Babies who have lower birth weights, for example, are more prone to chronic illnesses later in life. They also have, on average, slightly lower intelligence. But tests of whether birth weight might explain some of the link between intelligence and mortality have found no connection. Parents occupations are also related to their childs intelligence and later risk of illness: children from more privileged backgrounds tend to have higher intelligence and better health, and to live longer. However, there is no convincing evidence that parental background explains the link between higher intelligence and longer life. Other researchers have viewed intelligence test scores as possibly more than just an indicator of an efficient brain. After all, the brain is just one organ of the body, so people whose brains work well in early life may also have other organs and systems that are more efficient than others. But this system integrity idea is somewhat vague and difficult to test. The best we have done to date has been to examine whether peoples reaction speeds are related to intelligence and to mortality. They are. Reaction-time tests involve little thinking, and merely ask people to respond as fast as they can to simple stimuli. People who react faster have, on average, higher intelligence scores and live longer. But we need to think of better measures of the bodys integrity to test this idea more fully.A third potential explanation is that intelligence is about good decision-making. Every day, as we live our lives, we make decisions about our health: what, when, and how much to eat; how much exercise to take; how to look after ourselves if we have an illness; and so forth. Therefore, the reason that intelligence and death are linked might be that people with higher intelligence in childhood make better decisions about health, and have healthier behaviors. As adults, they tend to have better diets, exercise more, gain less weight, have fewer hangovers, and so on. So far, so good. But we do not yet have the full story. There have not been any studies with data on childhood intelligence, lots of subsequent data on adult health behaviors, and then a long-term follow-up for deaths. And only such a study could tell us whether it is these healthy behaviors that explain the link between intelligence and death. A fourth type of explanation is that people with higher intelligence in childhood tend to attain better educational qualifications, work in more professional jobs, have higher incomes, and live in more affluent areas. These variables are related to living longer, too. So, perhaps thats it: higher intelligence buys people into safer and more health-friendly environments. Certainly, in some studies, social class in adulthood seems to explain a lot of the link between intelligence and death. The problem is that this explanation is statistical. We are still not sure whether, say, education and occupation explain the effect of intelligence on health, or whether they are, in effect, merely surrogate measures of intelligence. Researchers have also searched for clues about the intelligence- mortality link in specific types of death. This has been revealing. Lower intelligence in early life is associated with a greater likelihood of dying from, for example, cardiovascular disease, accidents, suicide, and homicide. The evidence for cancer is less certain. As we have come across these specific findings, we have realized that each link might need a different explanation.Finally, we know that how intelligent we are and how long we shall live are caused by both environmental and genetic influences. There are experimental designs, using twins, that can find out the extent to which intelligence and mortality are linked because they share environmental and genetic influences. Among the most informative exercises we can undertake in cognitive epidemiology is to obtain a large group of twins on whom there is data on early-life intelligence and who were tracked for a long time to find out who had died. We havent yetcome across a large enough group of twins with such data. Finding one is a priority. The ultimate aim of this research is to find out what intelligent people have and do that enables them to live longer. Once we know that, we will be able to share and apply that knowledge with the aim of achieving optimal health for all.Q.Why does the author mention the need for further studies involving twins?I. Twins have similar genetic and environmental factors influencing them.II.To ascertain the effects on genetic and environmental make-up.III.To establish a link between what causes intelligent people to live longer.

Answer the question based on the passage given below.People with higher intelligence test scores in childhood and early adulthood tend to live longer. This result has been found among people from Australia, Denmark, England and Wales, Scotland, Sweden, and the United States. In fact, it has been found within every population that has been studied. Indeed, the impact of intelligence on mortality rivals well-known risk factors for illness and death, such as high blood pressure, being overweight, high blood glucose, and high cholesterol. Its effect is almost as important as that of smoking. Differences in human intelligence have environmental and genetic causes. An intelligence test score in early life ispartly a record of what the environment has wrought on the brain and the rest of the body up to that time. Babies who have lower birth weights, for example, are more prone to chronic illnesses later in life. They also have, on average, slightly lower intelligence. But tests of whether birth weight might explain some of the link between intelligence and mortality have found no connection. Parents occupations are also related to their childs intelligence and later risk of illness: children from more privileged backgrounds tend to have higher intelligence and better health, and to live longer. However, there is no convincing evidence that parental background explains the link between higher intelligence and longer life. Other researchers have viewed intelligence test scores as possibly more than just an indicator of an efficient brain. After all, the brain is just one organ of the body, so people whose brains work well in early life may also have other organs and systems that are more efficient than others. But this system integrity idea is somewhat vague and difficult to test. The best we have done to date has been to examine whether peoples reaction speeds are related to intelligence and to mortality. They are. Reaction-time tests involve little thinking, and merely ask people to respond as fast as they can to simple stimuli. People who react faster have, on average, higher intelligence scores and live longer. But we need to think of better measures of the bodys integrity to test this idea more fully.A third potential explanation is that intelligence is about good decision-making. Every day, as we live our lives, we make decisions about our health: what, when, and how much to eat; how much exercise to take; how to look after ourselves if we have an illness; and so forth. Therefore, the reason that intelligence and death are linked might be that people with higher intelligence in childhood make better decisions about health, and have healthier behaviors. As adults, they tend to have better diets, exercise more, gain less weight, have fewer hangovers, and so on. So far, so good. But we do not yet have the full story. There have not been any studies with data on childhood intelligence, lots of subsequent data on adult health behaviors, and then a long-term follow-up for deaths. And only such a study could tell us whether it is these healthy behaviors that explain the link between intelligence and death. A fourth type of explanation is that people with higher intelligence in childhood tend to attain better educational qualifications, work in more professional jobs, have higher incomes, and live in more affluent areas. These variables are related to living longer, too. So, perhaps thats it: higher intelligence buys people into safer and more health-friendly environments. Certainly, in some studies, social class in adulthood seems to explain a lot of the link between intelligence and death. The problem is that this explanation is statistical. We are still not sure whether, say, education and occupation explain the effect of intelligence on health, or whether they are, in effect, merely surrogate measures of intelligence. Researchers have also searched for clues about the intelligence- mortality link in specific types of death. This has been revealing. Lower intelligence in early life is associated with a greater likelihood of dying from, for example, cardiovascular disease, accidents, suicide, and homicide. The evidence for cancer is less certain. As we have come across these specific findings, we have realized that each link might need a different explanation.Finally, we know that how intelligent we are and how long we shall live are caused by both environmental and genetic influences. There are experimental designs, using twins, that can find out the extent to which intelligence and mortality are linked because they share environmental and genetic influences. Among the most informative exercises we can undertake in cognitive epidemiology is to obtain a large group of twins on whom there is data on early-life intelligence and who were tracked for a long time to find out who had died. We havent yetcome across a large enough group of twins with such data. Finding one is a priority. The ultimate aim of this research is to find out what intelligent people have and do that enables them to live longer. Once we know that, we will be able to share and apply that knowledge with the aim of achieving optimal health for all.Q.Which of the following is correct according to the passage?

Answer the question based on the information given in the passage.Sometime in the 1940s, Enrico Fermi was talking about the possibility of extraterrestrial intelligence with some other physicists. They were impressed that life had evolved quickly and progressively on Earth. They figured our galaxy holds about 100 billion stars, and that an intelligent, exponentially-reproducing species could colonize the galaxy in just a few million years. They reasoned that extraterrestrial intelligence should be common by now. Fermi listened patiently, then asked, simply, So, where is everybody? That is, if extraterrestrial intelligence is common, why havent we met any bright aliens yet? This conundrum became known as Fermis Paradox.Q. Which of the following, if true, does not resolve Fermis Paradox?I. Intelligent life may be abundant in the galaxy, but the huge interstellar distances make travelling to other solar systems impossible.II. Human technological progress hints that intelligent societies that reach a particular technological level -i.e. the invention of nuclear weapons - may wind up destroying themselves in the long run.III. Travelling to other stars requires moving faster than light, which violates the laws of physics, but it is still possible to send a message that way.IV. Earth may be a strange aberration in a galaxy largely devoid of intelligent life.

Group QuestionAnswer the following question based on the information given below.For a certain quiz, 10 questions have been short listed but the number of participating teams is yet undecided. The question numbers are labeled as Q1, Q2, Q3, Q4, Q5, Q6, Q7, Q8, Q9 and Q10.Since the number of participating teams is not decided, it was decided to form sets from these 10 questions with the restriction that each set must have at least two questions.However the selection of questions for any set was subject to following restrictions:1. Q1 and Q8 must be in the same set.2. Q8 and Q5 cannot be in the same set.3. Q2 and Q6 cannot be in the same set.4. Q9, Q2 and 0 4 if selected must be in the same set.5. Q3 and Q10 must appear in the set together.6. Q1 and Q3 cannot be in the same set.Additional information for Q.1 and Q.2:All the sets formed have 4 questions each.Q.How many sets of four questions can be formed? Correct answer is '6'. Can you explain this answer?

Top Courses for CATView all

Top Courses for CAT

Use following information to answer the questions.Keshav and Kamal know that their boss Mr. X’s birthday is one of the following 10 dates:May 3, May 6, May 9Jul 3, Jul 7Oct 1, Oct 6Nov 1, Nov 2, Nov 9Mr. X told Keshav only the month of his birthday, and told Kamal only the day. After that, Keshav first said: “I don’t know Mr. X’s birthday; Kamal doesn’t know it either.” After hearing what Keshav said, Kamal replied: “I didn’t know Mr. X’s birthday, but now I know it.” Keshav smiled and said: “Now I know it, too.” After looking at the 10 dates and hearing the ongoing comments, the intelligent administrative assistant wrote down Mr. X’s birthday without asking any questions.So what did the assistant write?a)May 3b)Oct 1c)May 9d)Nov 2Correct answer is option 'B'. Can you explain this answer?
Question Description
Use following information to answer the questions.Keshav and Kamal know that their boss Mr. X’s birthday is one of the following 10 dates:May 3, May 6, May 9Jul 3, Jul 7Oct 1, Oct 6Nov 1, Nov 2, Nov 9Mr. X told Keshav only the month of his birthday, and told Kamal only the day. After that, Keshav first said: “I don’t know Mr. X’s birthday; Kamal doesn’t know it either.” After hearing what Keshav said, Kamal replied: “I didn’t know Mr. X’s birthday, but now I know it.” Keshav smiled and said: “Now I know it, too.” After looking at the 10 dates and hearing the ongoing comments, the intelligent administrative assistant wrote down Mr. X’s birthday without asking any questions.So what did the assistant write?a)May 3b)Oct 1c)May 9d)Nov 2Correct answer is option 'B'. Can you explain this answer? for CAT 2024 is part of CAT preparation. The Question and answers have been prepared according to the CAT exam syllabus. Information about Use following information to answer the questions.Keshav and Kamal know that their boss Mr. X’s birthday is one of the following 10 dates:May 3, May 6, May 9Jul 3, Jul 7Oct 1, Oct 6Nov 1, Nov 2, Nov 9Mr. X told Keshav only the month of his birthday, and told Kamal only the day. After that, Keshav first said: “I don’t know Mr. X’s birthday; Kamal doesn’t know it either.” After hearing what Keshav said, Kamal replied: “I didn’t know Mr. X’s birthday, but now I know it.” Keshav smiled and said: “Now I know it, too.” After looking at the 10 dates and hearing the ongoing comments, the intelligent administrative assistant wrote down Mr. X’s birthday without asking any questions.So what did the assistant write?a)May 3b)Oct 1c)May 9d)Nov 2Correct answer is option 'B'. Can you explain this answer? covers all topics & solutions for CAT 2024 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for Use following information to answer the questions.Keshav and Kamal know that their boss Mr. X’s birthday is one of the following 10 dates:May 3, May 6, May 9Jul 3, Jul 7Oct 1, Oct 6Nov 1, Nov 2, Nov 9Mr. X told Keshav only the month of his birthday, and told Kamal only the day. After that, Keshav first said: “I don’t know Mr. X’s birthday; Kamal doesn’t know it either.” After hearing what Keshav said, Kamal replied: “I didn’t know Mr. X’s birthday, but now I know it.” Keshav smiled and said: “Now I know it, too.” After looking at the 10 dates and hearing the ongoing comments, the intelligent administrative assistant wrote down Mr. X’s birthday without asking any questions.So what did the assistant write?a)May 3b)Oct 1c)May 9d)Nov 2Correct answer is option 'B'. Can you explain this answer?.
Solutions for Use following information to answer the questions.Keshav and Kamal know that their boss Mr. X’s birthday is one of the following 10 dates:May 3, May 6, May 9Jul 3, Jul 7Oct 1, Oct 6Nov 1, Nov 2, Nov 9Mr. X told Keshav only the month of his birthday, and told Kamal only the day. After that, Keshav first said: “I don’t know Mr. X’s birthday; Kamal doesn’t know it either.” After hearing what Keshav said, Kamal replied: “I didn’t know Mr. X’s birthday, but now I know it.” Keshav smiled and said: “Now I know it, too.” After looking at the 10 dates and hearing the ongoing comments, the intelligent administrative assistant wrote down Mr. X’s birthday without asking any questions.So what did the assistant write?a)May 3b)Oct 1c)May 9d)Nov 2Correct answer is option 'B'. Can you explain this answer? in English & in Hindi are available as part of our courses for CAT. Download more important topics, notes, lectures and mock test series for CAT Exam by signing up for free.
Here you can find the meaning of Use following information to answer the questions.Keshav and Kamal know that their boss Mr. X’s birthday is one of the following 10 dates:May 3, May 6, May 9Jul 3, Jul 7Oct 1, Oct 6Nov 1, Nov 2, Nov 9Mr. X told Keshav only the month of his birthday, and told Kamal only the day. After that, Keshav first said: “I don’t know Mr. X’s birthday; Kamal doesn’t know it either.” After hearing what Keshav said, Kamal replied: “I didn’t know Mr. X’s birthday, but now I know it.” Keshav smiled and said: “Now I know it, too.” After looking at the 10 dates and hearing the ongoing comments, the intelligent administrative assistant wrote down Mr. X’s birthday without asking any questions.So what did the assistant write?a)May 3b)Oct 1c)May 9d)Nov 2Correct answer is option 'B'. Can you explain this answer? defined & explained in the simplest way possible. Besides giving the explanation of Use following information to answer the questions.Keshav and Kamal know that their boss Mr. X’s birthday is one of the following 10 dates:May 3, May 6, May 9Jul 3, Jul 7Oct 1, Oct 6Nov 1, Nov 2, Nov 9Mr. X told Keshav only the month of his birthday, and told Kamal only the day. After that, Keshav first said: “I don’t know Mr. X’s birthday; Kamal doesn’t know it either.” After hearing what Keshav said, Kamal replied: “I didn’t know Mr. X’s birthday, but now I know it.” Keshav smiled and said: “Now I know it, too.” After looking at the 10 dates and hearing the ongoing comments, the intelligent administrative assistant wrote down Mr. X’s birthday without asking any questions.So what did the assistant write?a)May 3b)Oct 1c)May 9d)Nov 2Correct answer is option 'B'. Can you explain this answer?, a detailed solution for Use following information to answer the questions.Keshav and Kamal know that their boss Mr. X’s birthday is one of the following 10 dates:May 3, May 6, May 9Jul 3, Jul 7Oct 1, Oct 6Nov 1, Nov 2, Nov 9Mr. X told Keshav only the month of his birthday, and told Kamal only the day. After that, Keshav first said: “I don’t know Mr. X’s birthday; Kamal doesn’t know it either.” After hearing what Keshav said, Kamal replied: “I didn’t know Mr. X’s birthday, but now I know it.” Keshav smiled and said: “Now I know it, too.” After looking at the 10 dates and hearing the ongoing comments, the intelligent administrative assistant wrote down Mr. X’s birthday without asking any questions.So what did the assistant write?a)May 3b)Oct 1c)May 9d)Nov 2Correct answer is option 'B'. Can you explain this answer? has been provided alongside types of Use following information to answer the questions.Keshav and Kamal know that their boss Mr. X’s birthday is one of the following 10 dates:May 3, May 6, May 9Jul 3, Jul 7Oct 1, Oct 6Nov 1, Nov 2, Nov 9Mr. X told Keshav only the month of his birthday, and told Kamal only the day. After that, Keshav first said: “I don’t know Mr. X’s birthday; Kamal doesn’t know it either.” After hearing what Keshav said, Kamal replied: “I didn’t know Mr. X’s birthday, but now I know it.” Keshav smiled and said: “Now I know it, too.” After looking at the 10 dates and hearing the ongoing comments, the intelligent administrative assistant wrote down Mr. X’s birthday without asking any questions.So what did the assistant write?a)May 3b)Oct 1c)May 9d)Nov 2Correct answer is option 'B'. Can you explain this answer? theory, EduRev gives you an ample number of questions to practice Use following information to answer the questions.Keshav and Kamal know that their boss Mr. X’s birthday is one of the following 10 dates:May 3, May 6, May 9Jul 3, Jul 7Oct 1, Oct 6Nov 1, Nov 2, Nov 9Mr. X told Keshav only the month of his birthday, and told Kamal only the day. After that, Keshav first said: “I don’t know Mr. X’s birthday; Kamal doesn’t know it either.” After hearing what Keshav said, Kamal replied: “I didn’t know Mr. X’s birthday, but now I know it.” Keshav smiled and said: “Now I know it, too.” After looking at the 10 dates and hearing the ongoing comments, the intelligent administrative assistant wrote down Mr. X’s birthday without asking any questions.So what did the assistant write?a)May 3b)Oct 1c)May 9d)Nov 2Correct answer is option 'B'. Can you explain this answer? tests, examples and also practice CAT tests.
Explore Courses for CAT exam

Top Courses for CAT

Explore Courses

Suggested Free Tests

Signup for Free!
Signup to see your scores go up within 7 days! Learn & Practice with 1000+ FREE Notes, Videos & Tests.
10M+ students study on EduRev
Get App
© EduRev
Education Revolution
Signup to see your scores go up within 7 days!
Access 1000+ FREE Docs, Videos and Tests
Takes less than 10 seconds to signup