Question

The LCM of 5 and 8 is _____.
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Answer 1

40

Explanation:

LCM = Lowest Common Multiple

Write down the prime factors of 5 and 8; you could use the factor tree method.

5 is a prime factor

8 = 2,2,2 (2^3)

There's non in common; No 5 within the prime factors of 8, no 2 within the prime factors of 5 (because 5 is a prime factor). So we multiply all of these together!

So 2 x 2 x 2 x 5 = 40

Answer 2

40

Explanation:

find a common multiple of 5 and 8 and the least common is 40