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�1 coins on a chessboard.

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fennster | 12:10 Fri 25th Feb 2005 | Quizzes & Puzzles
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If your where to place one �1 coin on the first square of a chessboard and double the amount on the second square and then double the amount on the next and so on, e.g. 1 coin on the 1st, 2 on the 2nd square, 4 the on 3rd, 8 on the 4th etc. What be the height of the coins on the final square?
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I calculate 2 to the power 63 coins.

�1 coin thickness of 3.15 mm

Total height is approx. 2.9 x (10 to the power 13) km

= 29,000,000,000,000

For comparison, the distance from the earth to the sun is a mere 150 million km (approx).

be pretty big, assuming a coin is 3mm thick about 27670116110546km high and you'd need one hell of a  wallet
You couldn't do it without gluing them together, once you have escaped the Earth's atmosphere they would float away. You need to add 2 to the power of 63 smidgens of glue.

This used to be about grains of rice for the dowry of a chinaman's daughter.


Answer was, not enough rice in the world.

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�1 coins on a chessboard.

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