Question

an army contingent of 616 members is to march behind an army band of 32 members in a parade .The two groups of march in the same number of columns. what is the maximum number of columns in which they can march

Answer 1

since i cannot do HCF here . 
 for this sum find out HCF (616,32)
then you will get the answer

and the answer is 8columns

Answer 2

Maximum number of columns which is common to both the groups = HCF (616, 32)

As you can see the HCF is 8

Therefore,

Maximum number of columns is 8.

Glad to help you!