Find the highest common factor of 36 and 84.	Choices
A) 4
B) 6
C) 12
D) 16
E) 18
36 = 22 x 32   84 = 22 x 3 x 7   H.C.F. = 22 x 3 = 12.   Answer: Option 12
<result>C</result>
Find the highest common factor of 36 and 84.