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 |