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  Number & Math Play

How Many Students?
 
Q A new school has opened with fewer than 500 students. One-third of the students is a whole number. So are one-fourth, one-fifth, and one-seventh of the students. How many students go to this school?


 
A 420 students: This is the only number under 500 that can be divided evenly by 3, 4, 5, and 7.

STRATEGY: Make a list.

Source:http://www.brainteasers.net, August 27, 2000.