You are viewing a single comment's thread from:
RE: Steem Riddle of the Week #2: Flipping Cards [Prize Doubled - 2SBD]
Count out 21 cards and lay them down into 2 piles (21 cards in each pile), as they are already on the white side facing up.
Count out 21 cards and lay them down into 2 piles (21 cards in each pile), as they are already on the white side facing up.
I don't think that works, there are 52 cards total, your strategy needs to split the deck into 2 piles that together have all 52 cards. Of those 52 cards, at the start, 42 are black side up and 10 are white side up. Your strategy would leave 10 cards left over.
Furthermore, even if you just deal out 2 groups of 21 cards, since you don't know which cards are white side up, you might get more white side up cards in one of those two piles than in the other.
It can be helpful to imagine the state of the deck when it is handed to you as a list like
w
b
w
b
b
b
w
b
b
b
.
.
.
.
b
Where you know there are 42 b's and 10 w's but you don't know the order.