Saperate the piles into 2 equal piles of 26 cards each. Flip all the card of on pile. I think this question is simmilar to the 20 coin question.
moshu123
29 December 2010
The correct solution is like this:
Saperate the piles into 2 piles of 13 & 39 cards each. Flip all the card of smaller pile.
chopstick
23 February 2013
divide in two pile one with 13 and other with 39.
flip the cards of pile 13.
explanation: say pile with 39 has x up cards so card with pile 13 has 13-x up cards means it has x down cards so if u flip u will have x up cards same as pile with 39 cards
bathfilms
21 July 2016
So far everyone has a correct solution that yields the same number UP in each pile.
However, Lonewolf's solution accomplishes this AND the same number DOWN in each pile.
Simply split into 2 equal piles and turn one upside down.
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Comments (5)
can you give a small hint ?
Saperate the piles into 2 equal piles of 26 cards each. Flip all the card of on pile. I think this question is simmilar to the 20 coin question.
The correct solution is like this:
Saperate the piles into 2 piles of 13 & 39 cards each. Flip all the card of smaller pile.
divide in two pile one with 13 and other with 39.
flip the cards of pile 13.
explanation: say pile with 39 has x up cards so card with pile 13 has 13-x up cards means it has x down cards so if u flip u will have x up cards same as pile with 39 cards
So far everyone has a correct solution that yields the same number UP in each pile.
However, Lonewolf's solution accomplishes this AND the same number DOWN in each pile.
Simply split into 2 equal piles and turn one upside down.
Add a Comment or Suggest an Answer