Question

Calculate the answer when

the largest prime number that is a factor of 28
is multiplied by
the smallest prime number that is a factor of 15

Answer 1

21.

Explanation:

Factors of 28=1,2,4,7,14,28 so largest prime number is 7.

Factors of 15=1,3,5,15 so smallest prime number is 3.

7x3=21(Ans)

Answer 2

21

Explanation:

7 is the largest prime number of 28

3 us the smallest prime number of 15

7 × 3 is 21