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T1W8 : How many cards?

Sunday, February 22, 2009 by bcps_maths

There are 30 students in the classroom. On Valentine's Day, every student gives a card to each of the other students. How many cards are exchanged?

1 comments

 

Gabriel Phoon said...

30 students each gave 29 cards.
Therefore, 30x29 = 870 cards.

March 27, 2009 at 5:09 AM  

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