Question

Using the common factor method, find the H.C.F. of
(ii) $25\text{and}20$

Answer 1

(ii) Factor of a number: The number by which the given number can be divided completely.
Factors of $25=1,5,25$
Factors of $20=1,2,4,5,10,20$
$\therefore$ Common factors between $25$ and $20=1,5$
Hence, H.C.F. of 25 and 20 is 5.