what is the least common multiple of 10 and 4?

The least common multiple (LCM) of 10 and 4 is 20.

Explanation:

• Multiples of 10: 10, 20, 30, 40, ...
• Multiples of 4: 4, 8, 12, 16, 20, 24, ...

The smallest number that appears in both lists is 20.