Question

Using the common factor method, find the H.C.F. of 25 and 20

Answer 1

F₂₅ = 1, 5, 25
F₂₀ = 1, 2, 4, 5, 10, 20
Common factors between 25 and 20 = 1, 5
H.C.F. of 25 and 20 = 5