Discussion Forum



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


A) 13

B) 17

C) 23

D) 37

E) 73

Answer:

Option C

Explanation:

Each of the given numbers is a prime number. But the number obtained on reversing the digits of each of the numbers except 23, is also a prime number