Question

What is the least common multiple (LCM) of 4 and 7?

Answer 1

`28`

Explanation:

First, write a list of the multiples of each number like so:

`4: " "4, 8, 12, 16, 20, 24, 28, 32, 36, 40, 44, 48, 52, 56 . . .`

`7:" " 7, 14, 21, 28, 35, 42, 49, 56, 63, 70, 77 . . .`

Then you find the first number which `4` and `7` have in common. `4` and `7` have `28` and `56` in common BUT the LCM would be `28` since that's the LEAST common, or the smallest number that they would have in common.

Hope this helped!