Find the highest common factor of 36 and 84.
4
6
12
18
Explanation:
36 = 22 x 32
84 = 22 x 3 x 7
$\therefore$ H.C.F. = 22 x 3 = 12.
Next Question
What is the smallest number which when diminished by 12, is divisible 8, 12, 22 and 24?