Question

12. Higher Order Thinking Find all the

factors of 38, 39, and 40. Do they have
any factors in common? Explain how you
can tell if some numbers have factors in
common without finding the factors.

Answer 1

38= 2×19

39= 3×13

40= 2×2×2×5

hcf = highest common factor = 1

if you can't seen any common factor then write 1 , it's common in all.

if all the number divide by same number, then it's common in factor