US News See If You Can Solve This Tricky Coin-Flipping Riddle

16:02  13 february  2018
16:02  13 february  2018 Source:   mentalfloss.com

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Make sure your head is in working order before trying to solve this riddle from TED-Ed, because it's a stumper. If every coin you pulled was originally gold-side-up, flipping them would give you 20 more silver-side-up coins .

They are confusing and complex and take lots of problem solving and “outside the box” thinking. This riddle is awesome because it can even be done in person. It’s tricky , but once you figure it out, you ’ll see how clever it is. Then you can test your friends and family!

  See If You Can Solve This Tricky Coin-Flipping Riddle © iStock Make sure your head is in working order before trying to solve this riddle from TED-Ed, because it's a stumper.

Here's the scenario: You're an explorer who's just stumbled upon a trove of valuable coins in a remote dungeon. Each coin has a gold side and a silver side, each with an identical scorpion seal.

The wizard who guards the coins agrees to let you have them, but he won't let you leave the room unless you separate the hoard into two piles with an equal number of coins with the silver side facing up in each.

You've just counted the total number of silver-side-up coins—20—when the lights go out. In the dark, you have no way of knowing which half of a coin is silver and which half is gold.

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See If You Can Solve This Tricky Coin - Flipping Riddle . Here's the scenario: You 're an explorer who's just stumbled upon a trove of valuable coins in a remote dungeon. Each coin has a gold side and a

While some of us are good at solving riddles , others are just not. How do you do? Here are 10 tricky little riddles to put your brains to the test. Challenge Your Mind and See If You Can Solve These Riddles .

How do you divide the pile without looking at it?

As TED-Ed explains, the task is fairly easy to complete, no psychic powers required. All you need to do is remove any 20 coins from the pile at random and flip them over.

No matter what combination of coins you choose, you will suddenly have a number of silver-side-up coins that's equal to whatever is left in the pile. If every coin you pulled was originally gold-side-up, flipping them would give you 20 more silver-side-up coins.

If you chose 13 gold-side-up coins and seven of the silver-side coins, you'd be left with 13 silver coins in the first pile and 13 silver ones in your new stack after flipping it over.

The solution is simple, but the algebra behind it may take a little more effort to comprehend. For the full explanation and a bonus riddle, check out the video from TED-Ed below.

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