Question

what is the least common multiple of 4 and 10?

Explanation:

Step1: Prime factorize 4

$4 = 2^2$

Step2: Prime factorize 10

$10 = 2^1 \times 5^1$

Step3: Take highest powers of primes

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

Step4: Calculate the product

$\text{LCM} = 4 \times 5 = 20$

Answer:

20