How many times must you fold a sheet of paper (0.1 mm thick) for the stack to reach the Moon?

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The answer

42 folds

Only 42 times. Doubling grows faster than your gut can follow.

How to get there

1. 10 folds: about 1,000 times thicker, so 10 cm
2. 20 folds: 100 m. 30 folds: 100 km
3. 42 folds: about 440,000 km

Source: Calculation

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