## The challenge

This **multiples of 3** and **multiples of 5** challenge is a variation of the common FizzBuzz
question.

If we list all the natural numbers below 10 that are multiples of 3 or 5, we get 3, 5, 6 and 9. The sum of these multiples is 23.

Finish the solution so that it returns the sum of all the multiples of 3 or 5 **below** the number passed in.

Note: If the number is a multiple of **both** 3 and 5, only count it *once*.

## Test cases

```
test.describe("Multiples of 3 and 5")
test.it("should handle basic cases")
test.assert_equals(solution(10), 23)
```

## The solution in Python

```
# take in a number
def solution(number):
# create a list to populate
answers = []
# loop through all numbers in the range
for i in range(number):
# if divisible by 3 or 5 and within range
if (i%3==0 or i%5==0) and i<number and i>0:
# add to the answers list
answers.append(i)
# return the sum of the answers
return sum(answers)
```