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Posted by on Sunday, December 2, 2012 at 5:29pm.

a box contains more than 25 but less than 40 balls.when we counted by 3 there are 1 left over,when we counted by 5 there are 2 left over.how many balls are there in the box ? please explain how you work it out,thanks

  • math - , Sunday, December 2, 2012 at 6:36pm

    there aren't that many multiples of 5 between 25 and 40: 3 and ,35

    it's easy to check that 37 = 7*5+2 = 12*3+1

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