<PRE><B>Question 474026</B>
Two bicyclist riding on a circular riding track start at the same time.
 One can make the full circle in 8 minutes.
 The other takes 10 minutes to make a full circle. 
How long will it take the fast bicyclist to catch up again with the slow bicyclist?
:
How about this?
In 10 min he is 2 min behind the faster bike
20 min he is 4 min behind 
30 min he is 6 min behind
40 min he is 8 min behind at which time the faster bike will catch the slower.
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