Question

what is the least common multiple of 8 and 20?

Explanation:

Step1: Prime factorize 8

$8 = 2^3$

Step2: Prime factorize 20

$20 = 2^2 \times 5^1$

Step3: Take highest powers of primes

$\text{LCM} = 2^3 \times 5^1$

Step4: Calculate the result

$2^3 \times 5 = 8 \times 5 = 40$

Answer:

40