Multiple choice

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

  1. 11

  2. 13

  3. 15

  4. 17

Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

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