Classification Questions for RRB Online Test - 3

Question: 11

Choose the one which is different from the rest three.

(A) 1754

(B) 2690

(C) 7324

(D) 9611

Ans: C

In all other numbers, the sum of the digits is 17.

Question: 12

Choose the one which is different from the rest three.

(A) 1325

(B) 5789

(C) 6432

(D) 7851

Ans: C

Each of the numbers except 6432, is an odd number.

Question: 13

Choose the one which is different from the rest three.

(A) 21

(B) 69

(C) 81

(D) 83

Ans: D

83 is the only prime number in the group.

Question: 14

Choose the one which is different from the rest three.

(A) 43

(B) 53

(C) 63

(D) 73

Ans: C

Each of the number except 63, is a prime number.

Question: 15

Choose the one which is different from the rest three.

(A) 21

(B) 69

(C) 81

(D) 83

Ans: C

81 is the only square number in the group.

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