What is the LCM of 56 and 78?

Answer 1

Prime factors of 56 are 23 x 7

Prime factors of 78 are 2 x 3 x 13

The LCM is the product of all the primes to their greatest power,

so the LCM of 56 and 78 is 23 x 3 x 7 x 13 = 8 x 273 = 2,184

Answer 2

To find the LCM of 56 and 42, you first have to break them down into their prime factors:

56 = 2x2x2x7

42 = 2x3x7

The next step is to work out the HCF. In this case that will be 2x7 = 14. Finally, you multiply the numbers together and divide by the HCF. 56x42/14 = 168. Therefore the LCM of 56 and 42 is 168.

Answer 3

15,176