Find the missing term: 10, 18, 34, 66, ? MCQ with Answer and Explanation

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Find the missing term: 10, 18, 34, 66, ?

A. 126

B. 130

C. 132

D. 128

Answer: Option B

Solution (By JKSSB Mock Tests)

Each term is multiplied by 2 and 2 is subtracted: 10×2-2=18, 18×2-2=34, 34×2-2=66, so next is 66×2-2=130.

This question belongs to: Reasoning Mental Reasoning

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Practice More Mental Reasoning Questions

Question #1

Find the odd one out: 10, 20, 30, 45, 50

A. 30

B. 45

C. 50

D. 20

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Correct Answer: Option B

Explanation:
All others are exact multiples of 10; 45 is not divisible by 10.

This question belongs to: Reasoning Mental Reasoning

Question #2

Find the missing term: 4, 6, 10, 18, 34, ?

A. 64

B. 66

C. 62

D. 58

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Correct Answer: Option B

Explanation:
Differences are +2, +4, +8, +16, each doubling; next difference is +32, so 34+32=66.

This question belongs to: Reasoning Mental Reasoning

Question #3

In a row, R is 7th from left and S is 10th from right. If they interchange, R becomes 12th from the left. How many persons are in the row?

A. 21

B. 20

C. 19

D. 22

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Correct Answer: Option A

Explanation:
S's original left position is R's new left position, 12. Total = 12 + 10 - 1 = 21.

This question belongs to: Reasoning Mental Reasoning

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