Question

Find the least common multiple of 9, 10, and 30.

Answer 1

The multiples are:

9, 18, 27, 36, 45, 54, 63, 72, 81, 90, 99, 108 . . .

10, 20, 30, 40, 50, 60, 70, 80, 90, 100, 110 . . .

30, 60, 90, 120, 150 . . .

What is the smallest multiple of those three numbers?

Answer 2

i got 90