100+ Mathematical Reasoning Questions Answers for Jee Mains - 1

Question: 1

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

(A) 13 - 39

(B) 21 - 15

(C) 24 - 48

(D) 81 - 63

Ans: D

This is the only group in which the sum of the digits of both the numbers is the same.

Question: 2

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

(A) 21 - 6

(B) 28 - 42

(C) 42 - 12

(D) 84 - 24

Ans: B

In all other pairs, 1st number = 2nd number x 7/2.

Question: 3

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

(A) 512 - 8

(B) 343 - 7

(C) 243 - 9

(D) 216 - 6

Ans: C

In all other pairs, first number is the cube of the second.

Question: 4

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

(A) 12 - 144

(B) 113 - 156

(C) 15 - 180

(D) 16 - 176

Ans: D

In all other pairs, second number is obtained by multiplying the first number by 12.

Question: 5

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

(A) 7 - 63

(B) 6 - 42

(C) 4 - 20

(D) 3 - 12

Ans: A

In all other pairs, (1st number) x (1st number + 1) = 2nd number.

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