CA Foundation Exam > CA Foundation Questions > 3n-2n-1 is divisible bya)15b)4c)6d)64Correct ...
Start Learning for Free
3n-2n-1 is divisible by
- a)15
- b)4
- c)6
- d)64
Correct answer is option 'B'. Can you explain this answer?
Most Upvoted Answer
3n-2n-1 is divisible bya)15b)4c)6d)64Correct answer is option 'B'. Can...
Solution:
To check the divisibility of 3n-2n-1, we need to simplify the expression.
3n-2n-1 = n-1
Now we have to check the divisibility of (n-1) by 4.
For a number to be divisible by 4, the last two digits of the number must be divisible by 4.
Let's take some examples to understand this concept.
- If n=5, then (n-1)=4, which is divisible by 4.
- If n=24, then (n-1)=23, which is not divisible by 4.
We can observe that if we take any value of n, (n-1) will not be divisible by 2 but it can be divisible by 4. Hence, option 'B' is the correct answer.
Answer: (b) 4
To check the divisibility of 3n-2n-1, we need to simplify the expression.
3n-2n-1 = n-1
Now we have to check the divisibility of (n-1) by 4.
For a number to be divisible by 4, the last two digits of the number must be divisible by 4.
Let's take some examples to understand this concept.
- If n=5, then (n-1)=4, which is divisible by 4.
- If n=24, then (n-1)=23, which is not divisible by 4.
We can observe that if we take any value of n, (n-1) will not be divisible by 2 but it can be divisible by 4. Hence, option 'B' is the correct answer.
Answer: (b) 4
Free Test
FREE
| Start Free Test |
Community Answer
3n-2n-1 is divisible bya)15b)4c)6d)64Correct answer is option 'B'. Can...
=3^4-2(4)-1
=81-8-1
=72
now divided 72 by 4 and 72 gets divided completely by 4 so the answer is 4
=81-8-1
=72
now divided 72 by 4 and 72 gets divided completely by 4 so the answer is 4
|
Explore Courses for CA Foundation exam
|
|
Similar CA Foundation Doubts
Top Courses for CA FoundationView all
3n-2n-1 is divisible bya)15b)4c)6d)64Correct answer is option 'B'. Can you explain this answer?
Question Description
3n-2n-1 is divisible bya)15b)4c)6d)64Correct answer is option 'B'. Can you explain this answer? for CA Foundation 2025 is part of CA Foundation preparation. The Question and answers have been prepared according to the CA Foundation exam syllabus. Information about 3n-2n-1 is divisible bya)15b)4c)6d)64Correct answer is option 'B'. Can you explain this answer? covers all topics & solutions for CA Foundation 2025 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for 3n-2n-1 is divisible bya)15b)4c)6d)64Correct answer is option 'B'. Can you explain this answer?.
3n-2n-1 is divisible bya)15b)4c)6d)64Correct answer is option 'B'. Can you explain this answer? for CA Foundation 2025 is part of CA Foundation preparation. The Question and answers have been prepared according to the CA Foundation exam syllabus. Information about 3n-2n-1 is divisible bya)15b)4c)6d)64Correct answer is option 'B'. Can you explain this answer? covers all topics & solutions for CA Foundation 2025 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for 3n-2n-1 is divisible bya)15b)4c)6d)64Correct answer is option 'B'. Can you explain this answer?.
Solutions for 3n-2n-1 is divisible bya)15b)4c)6d)64Correct answer is option 'B'. Can you explain this answer? in English & in Hindi are available as part of our courses for CA Foundation.
Download more important topics, notes, lectures and mock test series for CA Foundation Exam by signing up for free.
Here you can find the meaning of 3n-2n-1 is divisible bya)15b)4c)6d)64Correct answer is option 'B'. Can you explain this answer? defined & explained in the simplest way possible. Besides giving the explanation of
3n-2n-1 is divisible bya)15b)4c)6d)64Correct answer is option 'B'. Can you explain this answer?, a detailed solution for 3n-2n-1 is divisible bya)15b)4c)6d)64Correct answer is option 'B'. Can you explain this answer? has been provided alongside types of 3n-2n-1 is divisible bya)15b)4c)6d)64Correct answer is option 'B'. Can you explain this answer? theory, EduRev gives you an
ample number of questions to practice 3n-2n-1 is divisible bya)15b)4c)6d)64Correct answer is option 'B'. Can you explain this answer? tests, examples and also practice CA Foundation tests.
|
|
Explore Courses for CA Foundation exam
|
|
Signup for Free!
Signup to see your scores go up within 7 days! Learn & Practice with 1000+ FREE Notes, Videos & Tests.
|
© 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