# What number is a common multiple of 5 and 9?

Common multiples are the numbers which are the multiples of two or more numbers

## Answer: 45 is a common multiple of 5 and 9

Let's look into a common multiple of 5 and 9

**Explanation:**

Since 5 and 9 are co-prime numbers, their common multiple would be their product

Hence,

5 × 9 = 45