Find the next number in the series: 3, 8, 15, 24, ? MCQ with Answer and Explanation

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Find the next number in the series: 3, 8, 15, 24, ?

A. 34

B. 33

C. 35

D. 36

Answer: Option C

Solution (By JKSSB Mock Tests)

Differences are +5, +7, +9, +11; next difference is +13. 24+11? Wait series differences: 8-3=5, 15-8=7, 24-15=9. Next difference +11 gives 35.

This question belongs to: Reasoning Logical Reasoning

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Practice More Logical Reasoning Questions

Question #1

Find the next term: 6, 13, 28, 59, ?

A. 128

B. 124

C. 126

D. 122

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Correct Answer: Option D

Explanation:
6×2+1=13, 13×2+2=28, 28×2+3=59, 59×2+4=122.

This question belongs to: Reasoning Logical Reasoning

Question #2

In a row, A is 10th from left and B is 15th from left. If A is exactly between B and C, what is C's position from left?

A. 7th

B. 5th

C. 4th

D. 6th

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Correct Answer: Option B

Explanation:
A is exactly between B and C, so A's position = (B + C)/2. 10 = (15 + C)/2 ⇒ C = 5.

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Question #3

Find the next term: 7, 26, 63, 124, 215, ?

A. 342

B. 344

C. 343

D. 345

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Correct Answer: Option A

Explanation:
2³−1=7, 3³−1=26, 4³−1=63, 5³−1=124, 6³−1=215, 7³−1=342.

This question belongs to: Reasoning Logical Reasoning

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