What is the lcm of 10 and 4?

The least common multiple (LCM) of 10 and 4 is the smallest positive integer that is divisible by both 10 and 4 without leaving a remainder.

To find the LCM, we can write down the multiples of both numbers and look for the smallest common multiple:

Multiples of 10: 10, 20, 30, 40, 50, 60, ... Multiples of 4: 4, 8, 12, 16, 20, 24, ...

From the lists above, we can see that the smallest common multiple of 10 and 4 is 20. Therefore, the LCM of 10 and 4 is 20.