The Last Piece
Math brain teasers require computations to solve.
Mom bakes a cake. Dad ate 1/6 of the cake. Brother ate 1/5 of what was left. Then sister had 1/4 of the remaining cake. After that the dog ate 1/3 of the remaining cake, and finally another kid ate 1/2 of what was left after the dog was finished. What fraction of the whole cake is left for mom to eat?
HintShe cut it into six pieces after she baked it.
1/6 - the same amount everyone else got to eat.
Oct 10, 2003
| HOW could another kid eat 1 half of a cake gee he is a pig!|
Oct 10, 2003
|he ate half of what was LEFT... sice there were only 2 pieces left he ended eating one piece |
Oct 13, 2003
|It's funny that they all got the same amount of the cake. Nice!|
Oct 18, 2003
Oct 21, 2003
|Great teaser it as kinda easy but I Luved doing it|
Oct 22, 2003
|good one, my class liked it too!|
I do think it's kinda nasty that the second kid and the mom ate theirs "after the dog was finished"
Jul 10, 2004
| If it had been a normal dog and if it liked the cake at all, it would not have left anything for anyone else.|
Otherwise there's nothing wrong with letting the dog eat before some humans, as long as the dog uses a fork and the cake stays on the plate.
Jan 27, 2009
Silly me, I didn't see the obvious answer immediately, but it still solved easily in my head:
5/6 * 4/5 * 3/4 * 2/3 * 1/2 cancels out the 5s, 4s, 3s and 2s leaving 1/6.
Oct 21, 2009
|too easy. |
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