<PRE><B>Question 373302</B>
Walking beside you, your friend takes 50 strides per minute while
 you take 48 strides per minute. 
If you start in step, when will you be in step again?
:
Find the least common multiple of 50 and 48
Prime factor each
50: 2*5*5
48: 2*2*2*2*3
:
LCM 2*2*2*2*3*5*5: 1200
:
{{{1200/50}}} = 24 minutes
:
While you take 1200 strides, you friend will take 24*48 = 1152 strides, difference of 48 strides.</PRE>