Which one of the following is a factor of the sum of first twenty five natural numbers?

Question: Which one of the following is a factor of the sum of first twenty five natural numbers?

A   26

B   24

C   13

D   12

Answer:   13

 

Factors Description Solution
1 Every integer is divisible by 1. 325 ÷ 1 = 325
5 The sum of the first 25 natural numbers, 325, is divisible by 5. 325 ÷ 5 = 65
13 325 is divisible by 13. 325 ÷ 13 = 25
25 325 is divisible by 25. 325 ÷ 25 = 13