What is the LCM of 78 and 36?

Answer 1

First write down the factors of 36, which are 2 * 2 * 3 * 3; and the same for 78 which are 2 * 3 * 19, so the smallest factors needed to make the LCM are

2 * 2 * 3 * 3 * 19 = 684 .

That is the lowest number into which 36 and 78 will divide exactly. Such a number has to contain enough factors from the two sets so that both the 2 * 2 * 3 * 3 and the 2 * 3 * 19 can all be found .

Answer 2

It is: 468