Question

find the lcm of 4 and 5.

Explanation:

Step1: Prime Factorization

Prime factorize 4 and 5.
$4 = 2 \times 2$
$5 = 5$

Step2: LCM Calculation

LCM is the product of the highest powers of all primes.
Here, primes are 2 (power 2) and 5 (power 1).
LCM = $2^2 \times 5 = 4 \times 5 = 20$

Answer:

20