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.
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Answer
1/6  the same amount everyone else got to eat.
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Comments
avril_lavigne
Oct 10, 2003
 HOW could another kid eat 1 half of a cake gee he is a pig! 
just_moi
Oct 10, 2003
 he ate half of what was LEFT... sice there were only 2 pieces left he ended eating one piece 
Gerd
Oct 13, 2003
 It's funny that they all got the same amount of the cake. Nice! 
howdyall1311
Oct 18, 2003
 Easy...but good 
mrazmerized
Oct 21, 2003
 Great teaser it as kinda easy but I Luved doing it 
catsclutter
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" 
canu
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. 
javaguru
Jan 27, 2009
 Nice teaser.
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.

calmsavior
Oct 21, 2009
 too easy. 
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