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Number Classification Reasoning Questions for Competitive Exams

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Number Classification Reasoning Questions


Q.11. Which one does not belong to the group?

(A) 39

(B) 21

(C) 83

(D) 51

Ans .   C

83 is the only prime number in the group.

Q.12. Which one does not belong to the group?

(A) 19

(B) 17

(C) 29

(D) 23

(E) 27

Ans .   E

All other numbers are prime numbers except 27.

Q.13. Which one does not belong to the group?

(A) 34, 4, 8

(B) 22, 4, 5

(C) 54, 4, 13

(D) 37, 4, 9

Ans .   D

In all other groups, the rest number is obtained by adding 2 to the product of the second and the third numbers.

Q.14. Which one does not belong to the group?

(A) 5

(B) 3

(C) 13

(D) 11

(E) 9.

Ans .   E

All other numbers are prime numbers except 9 while 9 is a composite number.

Q.15. Which one does not belong to the group?

(A) 161

(B) 115

(C) 391

(D) 253

(E) 345

Ans .   E

All others are not divisible by 3 whereas 345 is divisible by 3.

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