A brain teaser

[Rankenphile]

I'll be gone for most of this weekend, although I may have time to pop in here and there on my laptop from the hotel from time to time. If nobody has the answer by Monday, I'll post the solution - but hopefully you guys can get it by then.

[OvRiDe]

I think it involves nightvision goggles..

[OvRiDe]

I sent a PM with my answer.. Didnt want to post it and give it away if it was right..

[Cevinzol]

I know but I'm not telling
(that way I can look smug and superior when the answer is posted)

[Judgement]

It took me some time to figure it out but I got a deck of cards out and went at it I wont tell the anwser but the main hint is

The piles do not have to have the same number of total cards in them, only the same number of cards facing up.

[Rankenphile]

OvRide sent me the answer in a PM, and he was correct.

And Judgement is right. That is indeed a primary clue as to the solution.

[OvRiDe]

Woohoo.. wheres my prize!!! j/k

When this one is done.. I got a pretty fun little logic problem that they asked in a job interview that I would like to share.

[Rankenphile]

Okay, here is the answer, for those of you still wondering.

In order to get an equal number of cards in both piles, you count off the first thirteen cards from the deck, then flip them over and place them next to the remaining cards.

Any cards taken from the first pile would be righted. Say you took thirteen cards and four were face up. That leaves nine face-up cards in the remaining deck. Once you flip the thirteen cards, nine will be face up and the original four would be face down. This works with any number of face-up or face-down cards.