Find the HCF as a product of prime numbers

Question 1:

A = 2 2 × 5 2 B = 2 3 ×5

HCF = 2 2 ×5

Question 2:

A = 2× 5 2 B = 2 2 ×3×5

HCF = 2×5

Question 3:

A = 2× 5 2 B = 2 2 × 3 2 ×5

HCF = 2×5

Question 4:

A = 5 3 B = 2 2 × 5 2

HCF = 5 2