Question

One of the number in the box is different from the rest. 13 17 21 23 29. Which one and why?

Answer 1

Answer: The answer is 23

Step-by-step explanation: It is 23 because according to the following pattern each number differs from 4. Ex: 13 + 4=  17, 17 + 4= 21

But 21 + 4 gives the answer as 25 not 23 so the number 23 is different from the rest.

Hope it helps!!!