100+ Mathematical Reasoning Questions with Answers - 2

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Question: 6

Choose the odd numeral pair/group in each of the following questions.

(A) 1 - 10

(B) 3 - 8

(D) 7 - 50

Ans: D

In all other pairs, the second number is one less than the square of the first number.

Question: 7

Choose the odd numeral pair/group in each of the following questions.

(A) 81 - 36

(B) 25 - 54

(D) 21 - 49

Ans: B

This is the only pair in which the two numbers have no common factor.

Question: 8

Choose the odd numeral pair/group in each of the following questions.

(A) 15 - 12

(B) 20 - 10

(D) 45 - 27

Ans: B

In all other pairs, the two numbers have 3 as the common factor.

Question: 9

Choose the odd numeral pair/group in each of the following questions.

(A) 50 - 60

(B) 40 - 50

(D) 10 - 20

Ans: D

This is the only pair in which the second number is twice the first one.

Question: 10

Choose the odd numeral pair/group in each of the following questions.

(A) 1009 - 1331

(B) 343 - 512

(D) 8 - 27

Ans: A

All other pairs contain cubes of two successive natural numbers. E.g. 8 = 2³ & 27 = 3³.

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