Question

Fort do the prime factorisation of the number, then list the factor with the help of prime factorisation

A. 28
B. 63
C. 42

Answer 1

here is your answer

(1) 28 = 2×2×7
common factor = 2

(2) 63 = 3×3×7
common factor = 3

(3) 42= 2×3×7
common factor = 1

hope this helps you
be brainly

Answer 2

A. 28= 2×2×7
Common factor=2
B. 63=3×3×7
Common factor=3
C. 42= 2×3×7
Common factor=none