Monday, July 15, 2013

IPM mega finals STD IV answers

Grandma baked a cake for her grand children who will visit in the afternoon. Unfortunately she forgot whether only 3, 5  or 6 of her grand children will come over. She wanted to ensure that every child gets the same amount of cake. Then to be prepared for all the possibilities, she should cut the cake into how many pieces.




Answer:
The minimum no. of pieces she should make so that it can be equally distributed is the LCM of 3,5 and 6.

So, the answer is 30.

So, in case 3 grand children come ----she will give 10 pieces each.
in case 5 grand children come ----she will give 6 pieces each.
in case 6 grand children come ----she will give 5 pieces each.

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