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In certain numbers are given, out of which all except one share some common property and hence are alike, while one is different and this number is to be chosen.

1)

 In the following question, four numbers are given. Out of these, three are alike in a certain way but the rest one is different. Choose the one which is different from the rest three.


A) 11

B) 13

C) 15

D) 17

Answer:

Option C

Explanation:

Each of the numbers except 15, is a prime number.