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All questions of Knowing our Numbers for CTET & State TET Exam

The least number that is divisible by all the numbers from 1 to 10 (both inclusive) is
  • a)
    10
  • b)
    100
  • c)
    504
  • d)
    2520
Correct answer is option 'D'. Can you explain this answer?

Varun Kapoor answered
We have to find the least number that is divisible by all numbers from 1 to 10.
∴ LCM (1 to 10) = 23 × 32 × 5 × 7
= 2520
Thus, 2520 is the least number that is divisible by every element and is equal to the least common multiple.
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Can you explain the answer of this question below:
When one is added to the greatest four-digit number what is the result?
  • A:
    smallest 4-digit number
  • B:
    smallest 5-digit number
  • C:
    greatest 5-digit number
  • D:
    greatest 4-digit number
The answer is B.

Jhanvi Banerjee answered
 Smallest five digit number
Step-by-step explanation:
the greatest four digit number is 9,999
so, 9,999 + 1 = 10,000
therefore,  the number obtained is the smallest 5 digit number

When 1 is added to the greatest 3-digit number, what is the result?
  • a)
    Smallest 3-digit number
  • b)
    Greatest 4-digit number
  • c)
    Greatest 3-digit number
  • d)
    Smallest 4-digit number
Correct answer is option 'D'. Can you explain this answer?

Geetika Shah answered
  • We know that the greatest 3-digit number is 999.
  • When one is added to the  greatest 3-digit number we get the smallest 4-digit number i.e.,
    ► 999 + 1 = 1000
  • So option D is the correct answer. 

When one is added to the greatest 2-digit number what is the result?
  • a)
    smallest 3-digit number
  • b)
    smallest 2-digit number
  • c)
    greatest 2-digit number
  • d)
    greatest 3-digit number
Correct answer is 'A'. Can you explain this answer?

Ankita Saha answered
We know that the greatest 2 digit number is 99.
When one is added to greatest 2 digit number i.e, 99 + 1 = 100 
we get smallest 3 digit number.
So option A is the correct answer. 

What will be the correct ascending order of 847, 9754, 8320, 571 ?
  • a)
    9754, 847, 8320, 571
  • b)
    571, 847, 8320, 9754
  • c)
    571, 8320, 847, 9754
  • d)
    9754, 8320, 847, 571
Correct answer is option 'B'. Can you explain this answer?

Anoushka Chavan answered
Ascending Order of Numbers

To answer this question, we need to arrange the given numbers in ascending order, which means from the smallest to the largest number.

Steps to follow:

1. Compare the first two numbers and arrange them in ascending order.

2. Compare the third number with the first two numbers and place it in the correct position.

3. Similarly, compare the fourth number with the three numbers arranged till now and place it in the correct position.

4. Continue this process until all the numbers are arranged in ascending order.

Arranging the given numbers:

Let's follow the above steps to arrange the given numbers in ascending order.

1. Compare 847 and 9754. 847 is smaller than 9754. So, we can write 847 first.

2. Compare 8320 with 847. 8320 is larger than 847. So, we can write it after 847.

3. Compare 571 with the three numbers arranged till now. 571 is smaller than all three numbers. So, we can write it first.

4. Compare 9754 and 8320 with the three numbers arranged till now. 9754 is larger than all three numbers, and 8320 is larger than 571 and 847. So, we can write 8320 after 847 and 9754 after 8320.

Therefore, the correct ascending order of the given numbers is B) 571, 847, 8320, 9754.

When 1 is subtracted from smallest 3-digit number what is the result?
  • a)
    smallest 2-digit number
  • b)
    greatest 3-digit number
  • c)
    greatest 2-digit number
  • d)
    greatest 1-digit number
Correct answer is option 'C'. Can you explain this answer?

Rahul Mehra answered
We know , smallest 3 digit number is 100
On subtracting 1 from smallest 3 digit number 
We get , 100 - 1 = 99 which is greatest 2 digit number . 
So option C is the correct answer. 

When 1 is subtracted from smallest 4-digit number what is the result?
  • a)
    greatest 3-digit number
  • b)
    greatest 2-digit number
  • c)
    smallest 2-digit number
  • d)
    greatest 1-digit number
Correct answer is option 'A'. Can you explain this answer?

Ragini jain answered
The smallest 4-digit number is 1000
On subtracting 1 from smallest 4-digit number , we get 1000 - 1 = 999 which is greatest 3 digit number. 
So Option A is the correct answer. 

The smallest 8 digit number is called ______.
  • a)
    Ten lakh
  • b)
    One lakh
  • c)
    Ten crore
  • d)
    One crore
Correct answer is option 'D'. Can you explain this answer?

Gayatri Chavan answered
The largest 7-digit number is 99,99,999. The successor of 99,99,999 = 99,99,999 + 1 = 1,00,00,000. So, 10000000 is the smallest 8-digit number. ... -99999999 is the smallest negative value if (-) is not a digit.

Can you explain the answer of this question below:

Make the greatest four digit number by using any one digit twice by 3, 8, 7?

  • A:

    8378

  • B:

    8873

  • C:

    3387

  • D:

    7783

The answer is b.

Geetika Shah answered
8873  is the correct ✔ answer. Here, we can see the largest no. Is 8 , we have repeated it twice, then 7  then 3 . So, the greatest no. here is 8873.

If we add 1 more to the greatest 6-digit number we get
  • a)
    smallest 6-digit number
  • b)
    smallest 5-digit number
  • c)
    smallest 7-digit number
  • d)
    smallest 4-digit number
Correct answer is option 'C'. Can you explain this answer?

Shivam Saha answered
greatest 6-digit number is 999,999 
On adding 1 to  greatest 6-digit number we get,
999,999 + 1 = 1000000 i.e, smallest 7-digit number.
So option C is the correct answer. 

Make the greatest and the smallest four digit number using any four-digit number with digit 5 always at thousand place.
  • a)
    5999, 5000
  • b)
    5789, 5120
  • c)
    5986, 5012
  • d)
    5987, 5012
Correct answer is 'A'. Can you explain this answer?

Chetan Rian answered
The option (a) is wrong. Because in this question clear write the any four - digit using .So,how the answer is 5999 and 5000.
But
in this answer only two digit is used.

Using digits 0,1,2,3 without repetition make the smallest four digit number?
  • a)
    3201
  • b)
    1023
  • c)
    3210
  • d)
    2310
Correct answer is option 'B'. Can you explain this answer?

Priyanka Sharma answered
1023 is the correct ✔ answer. As  we can see, we cannot put 0 at  the the first place, so the smallest no. Is 1 , then 2 and 3 . So, 1023 is the correct ✔ answer.

Using digits 4, 5, 6 and 0 without repetition make the greatest four digit number?
  • a)
    4650
  • b)
    6540
  • c)
    4560
  • d)
    5640
Correct answer is option 'B'. Can you explain this answer?

Varun Kapoor answered
6540 is the correct ✔ answer.  As, We can see 6 is the largest no. In the given no.'s, then 5 then 4 then 0 . Therefore, 6540 is the correct one.

Can you explain the answer of this question below:

Correct descending order of 5000, 7500, 85400, 7861 is

  • A:

    85400, 7861, 7500, 5000

  • B:

    85400, 7500, 7861, 5000

  • C:

    7861, 7500, 7861, 5000

  • D:

    5000, 7500, 85400, 7861

The answer is A.

Shruti Mishra answered
Descending order is basically greatest to smallest. The given numbers, 85400 is the greatest, then comes 7861, then 7500 and last, 5000. 85400, 7861, 7500, 5000 

If we add 1 more to the greatest 5-digit number we get
  • a)
    smallest 5-digit number
  • b)
    smallest 4-digit number
  • c)
    smallest 3-digit number
  • d)
    smallest 6-digit number
Correct answer is option 'D'. Can you explain this answer?

Shalini Chakraborty answered
Greatest 5-digit number is 99999
On adding 1 to greatest 5-digit number we get
99999 + 1 = 10,0000 which is smallest 6 digit number . 
S option D is the correct answer. 

Sum of 178 and 69 to nearest hundred is
  • a)
    100
  • b)
    200
  • c)
    250
  • d)
    300
Correct answer is option 'B'. Can you explain this answer?

Amar Singh answered
Understanding the Problem
To find the sum of 178 and 69 and round it to the nearest hundred, we first need to perform the addition.
Step 1: Calculate the Sum
- Add the numbers:
178 + 69 = 247
Step 2: Rounding to the Nearest Hundred
- To round 247 to the nearest hundred, we look at the tens digit, which is 4 in this case.
- According to rounding rules:
- If the tens digit is 5 or greater, we round up.
- If the tens digit is less than 5, we round down.
Step 3: Apply the Rounding Rule
- Since the tens digit is 4 (less than 5), we round down to the nearest hundred.
Final Result
- The nearest hundred to 247 is 200.
Answer Confirmation
- Therefore, the correct answer is option 'B': 200.
This method of addition and rounding provides a clear understanding of how to arrive at the answer systematically.

If we add 1 more to the greatest 4-digit number we get
  • a)
    smallest 5-digit number
  • b)
    smallest 7-digit number
  • c)
    smallest 6-digit number
  • d)
    smallest 8-digit number
Correct answer is option 'A'. Can you explain this answer?

Sushant Kapoor answered
The greatest 4-digit number is 9999 on adding 1 to greatest 4-digit number we get 
9999 + 1 = 10,000 which is smallest 5 digit number.
So option A is the correct answer. 
 

Can you explain the answer of this question below:

Make the greatest four digit number by using any one digit twice by 0, 4, 9?

  • A:

    9404

  • B:

    9440

  • C:

    9940

  • D:

    9400

The answer is C.

Amit Sharma answered
9940 is the correct✔ answer. Here, the largest no. Is 9 , we repeated it twice, then 4 , then 0 . So, 9940 is the correct one.

If we add 1 more to the greatest 3-digit number we get
  • a)
    smallest 4-digit number
  • b)
    smallest 7-digit number
  • c)
    smallest 5-digit number
  • d)
    smallest 6-digit number
Correct answer is option 'A'. Can you explain this answer?

Tavishi Shah answered
As the greatest 3-digit number is 999
So on adding 1 to  greatest 3-digit number 
We get , 999 + 1 = 1000 which is smallest 4 digit number . 
So option A is the correct answer. 

Make the greatest four digit number by using any one digit twice by 0, 4, 9?
  • a)
    9404
  • b)
    9440
  • c)
    9940
  • d)
    9400
Correct answer is 'C'. Can you explain this answer?

Lavanya Menon answered
9940 is the correct✔ answer. Here, the largest no. Is 9 , we repeated it twice, then 4 , then 0 . So, 9940 is the correct one.

When one is added to the greatest 2-digit number what is the result?
  • a)
    smallest 3-digit number
  • b)
    smallest 2-digit number
  • c)
    greatest 2-digit number
  • d)
    greatest 3-digit number
Correct answer is option 'A'. Can you explain this answer?

Rithika Patel answered
We know that the greatest 2 digit number is 99.
When one is added to greatest 2 digit number i.e, 99 + 1 = 100 
we get smallest 3 digit number.
So option A is the correct answer. 

What is the Roman numeral for 50?
  • a)
    L
  • b)
    X
  • c)
    C
  • d)
    D
Correct answer is option 'A'. Can you explain this answer?

Rounak Patel answered
Roman Numeral for 50
• The Roman numeral for 50 is represented by the letter "L".
• In Roman numerals, "L" stands for 50.
• The Roman numeral system uses letters to represent numbers, with "L" representing 50 in this case.
• It is important to understand the basic Roman numeral symbols to recognize and interpret numbers written in this ancient numeral system.
• Therefore, when you see the Roman numeral "L", you can identify it as representing the number 50.

1 billion = ______ million
  • a)
    10
  • b)
    100
  • c)
    1000
  • d)
    10000
Correct answer is option 'C'. Can you explain this answer?

Ashwin Chauhan answered
Converting 1 billion to million:
To convert 1 billion to million, you need to understand the concept of place value in numbers.

Understanding the place value:
- 1 billion is equal to 1,000 million because when you move down the place value chart from billion to million, you need to multiply by 1,000.

Conversion process:
- 1 billion = 1,000 million
- So, 1 billion is equivalent to 1,000 million.
Therefore, the correct answer is option 'C' which represents 1 billion as 1000 million.

Correct descending order of 5000, 7500, 85400, 7861 is
  • a)
    85400, 7861, 7500, 5000
  • b)
    85400, 7500, 7861, 5000
  • c)
    7861, 7500, 7861, 5000
  • d)
    5000, 7500, 85400, 7861
Correct answer is 'A'. Can you explain this answer?

Moumita Roy answered
Descending order is basically greatest to smallest. The given numbers, 85400 is the greatest, then comes 7861, then 7500 and last, 5000. 85400, 7861, 7500, 5000 

Sum 3537 + 3884 to nearest tens is
  • a)
    1000
  • b)
    7400
  • c)
    7420
  • d)
    7440
Correct answer is option 'C'. Can you explain this answer?

EduRev Class 6 answered
To find the sum of 3537 and 3884 to the nearest tens, we round each number to the nearest tens and then add them together.
Rounding 3537 to the nearest tens gives us 3540, and rounding 3884 to the nearest tens gives us 3880.
Adding these rounded numbers together gives us 7420, which is the nearest tens value for the sum of 3537 + 3884.

What is the value of the Roman numeral XXIV?
  • a)
    14
  • b)
    24
  • c)
    34
  • d)
    44
Correct answer is option 'B'. Can you explain this answer?

Arjun Yadav answered
Value of Roman Numeral XXIV
Roman numerals are a system of numerical notations used in ancient Rome. Each letter represents a different value. In this case, XXIV is a Roman numeral that represents the number 24.

Explanation
- The Roman numeral XX represents 20 (X=10, so XX=10+10=20)
- The Roman numeral IV represents 4 (I=1, V=5, so IV=5-1=4)
- When we combine XX and IV, we get 20 + 4 = 24
- Therefore, the value of the Roman numeral XXIV is 24.

Conclusion
In conclusion, the Roman numeral XXIV represents the number 24 in the decimal system. It is important to understand the value of each Roman numeral letter to correctly interpret and convert Roman numerals into regular numbers.

Estimated the value of the product of 108 and 12.
  • a)
    1000
  • b)
    1500
  • c)
    1700
  • d)
    2000
Correct answer is option 'A'. Can you explain this answer?

EduRev Class 6 answered
The product of 108 and 12 can be estimated by rounding both numbers to the nearest ten. 108 rounds to 110 and 12 rounds to 10. Multiplying these rounded numbers gives us an estimate of 1100. However, since we rounded up for both numbers, the actual product will be slightly less than 1100. The closest option is 1000, which is the correct answer.

When 1 is subtracted from the smallest 5-digit number, what is the result?
  • a)
    Greatest 2-digit number
  • b)
    Greatest 3-digit number
  • c)
    Greatest 4-digit number
  • d)
    Smallest 2-digit number
Correct answer is option 'C'. Can you explain this answer?

Sanskriti Bose answered
Solution:

The smallest 5-digit number is 10,000.

When 1 is subtracted from 10,000, the result is:

10,000 - 1 = 9,999

To determine which option represents 9,999, we need to compare it to the greatest numbers in each option.

a) Greatest 2-digit number is 99, which is smaller than 9,999. So, option a is incorrect.
b) Greatest 3-digit number is 999, which is smaller than 9,999. So, option b is incorrect.
c) Greatest 4-digit number is 9,999, which is equal to the result. So, option c is correct.
d) Smallest 2-digit number is 10, which is smaller than 9,999. So, option d is incorrect.

Therefore, the correct answer is option C: Greatest 4-digit number.

What is the even prime number?
  • a)
    3
  • b)
    2
  • c)
    1
  • d)
    None of the above
Correct answer is option 'B'. Can you explain this answer?

EduRev Class 6 answered
The only even prime number is 2. This is because a prime number is defined as a number greater than 1 that has no positive divisors other than 1 and itself. While all other even numbers can be divided by 2, making them not prime, 2 can only be divided by 1 and 2, making it the only even prime number.

The tickets sold for the semi-final IPL match were 9872, whereas 10050 tickets were sold during the finals. How many more tickets, estimated to the nearest tens, were sold during the finals?
  • a)
    160
  • b)
    170
  • c)
    180
  • d)
    190
Correct answer is option 'C'. Can you explain this answer?

Rajat Chatterjee answered
Understanding the Ticket Sales
To find out how many more tickets were sold during the finals compared to the semi-final match, we need to perform a simple subtraction of the two ticket sales figures.
Step 1: Identify the Ticket Sales
- Semi-final tickets sold: 9872
- Final tickets sold: 10050
Step 2: Calculate the Difference
Now, we subtract the number of tickets sold during the semi-finals from the number sold during the finals:
- Difference = Final tickets - Semi-final tickets
- Difference = 10050 - 9872
Step 3: Perform the Calculation
- 10050 - 9872 = 178
So, the difference in tickets sold is 178.
Step 4: Estimate to the Nearest Tens
Now, we need to round this difference to the nearest ten. The number 178 falls between 170 and 180:
- Since the last digit (8) is greater than 5, we round up to 180.
Conclusion
Thus, the estimated number of tickets sold during the finals, rounded to the nearest tens, is 180. Therefore, the correct answer is option 'C'.
This method of subtraction and rounding provides a clear understanding of the ticket sales comparison.

Which Roman numeral represents the number 500?
  • a)
    D
  • b)
    L
  • c)
    C
  • d)
    M
Correct answer is option 'A'. Can you explain this answer?

Varun Patel answered
Explanation:

Roman Numerals:
- Roman numerals are a numeral system that originated in ancient Rome. They are still used today in various contexts.
- The system uses combinations of letters from the Latin alphabet to represent numbers.

Representing 500:
- The Roman numeral that represents the number 500 is "D."
- The letter "D" in Roman numerals stands for the number 500.
- It is formed by combining the letter "C" (which represents 100) with a horizontal line on top, signifying multiplication by 100. This results in the value of 500.

Options:
- Option A: "C" represents the number 100 in Roman numerals.
- Option B: "L" represents the number 50 in Roman numerals.
- Option C: "D" represents the number 500 in Roman numerals.
- Option D: "M" represents the number 1000 in Roman numerals.
Therefore, the correct Roman numeral representation for the number 500 is option A which is "C."

Chapter doubts & questions for Knowing our Numbers - Mathematics & Pedagogy Paper 2 for CTET & TET Exams 2024 is part of CTET & State TET exam preparation. The chapters have been prepared according to the CTET & State TET exam syllabus. The Chapter doubts & questions, notes, tests & MCQs are made for CTET & State TET 2024 Exam. Find important definitions, questions, notes, meanings, examples, exercises, MCQs and online tests here.

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