Puzzle | 10 Coins Puzzle

You are blindfolded, and 10 coins are placed in front of you on the table. You are allowed to touch the coins, but can’t tell which way up they are by feel. You are told that there are 5 coins heads up, and 5 coins tails up, but not which ones are which. Can you make two piles of coins, each with the same number of heads up? You can flip the coins any number of times. 

Check if you were right - full answer with solution below.

Solution: 

Divide the coins into two equal piles. Then, flip all the coins in one of the piles.
 For example, consider:

• Pile 1: H T T T T
• Pile 2: H H H H T

Now flip all coins in Pile 1:

• Pile 1 becomes: T H H H H
• Pile 2 remains: H H H H T

Now, the number of heads in Pile 1 = heads in Pile 2.