Cards Facing Up Puzzle - Solution

The Puzzle:

Cards Facing Up

A blind-folded man is handed a deck of 52 cards and told that exactly 10 of these cards are facing up.

He is asked to divide those cards into two piles, each with the same number of cards facing up.

He can't peek, get help, or damage the cards, but may use any strategy that occurs to him to do so.

How can he do it?

Our Solution:

The blind-folded man divides the cards into two piles with 10 and 42 cards each.

He then flips all cards in the smaller pile.

Puzzle Author: Unknown

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