Practice Room · Paper folded in half, again

Practice: Folding

For each question, give a low and a high you are 80% sure the answer sits between. Tighter brackets score more; a miss scores zero. You can type 2 million, 3e9, 1.5k or 45%.

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FoldingQuestion 1 of 5

A sheet of paper 0.1 mm thick is folded in half 27 times (pretend that is possible: ordinary paper is hard to fold more than 7 or 8 times). How thick is the folded stack, in metres?

Low High metres

FoldingQuestion 2 of 5

A sheet of paper 0.1 mm thick is folded in half 32 times (pretend that is possible: ordinary paper is hard to fold more than 7 or 8 times). How thick is the folded stack, in metres?

Low High metres

FoldingQuestion 3 of 5

A sheet of paper 0.1 mm thick is folded in half 34 times (pretend that is possible: ordinary paper is hard to fold more than 7 or 8 times). How thick is the folded stack, in metres?

Low High metres

FoldingQuestion 4 of 5

A sheet of paper 0.1 mm thick is folded in half 33 times (pretend that is possible: ordinary paper is hard to fold more than 7 or 8 times). How thick is the folded stack, in metres?

Low High metres

FoldingQuestion 5 of 5

A sheet of paper 0.1 mm thick is folded in half 31 times (pretend that is possible: ordinary paper is hard to fold more than 7 or 8 times). How thick is the folded stack, in metres?

Low High metres

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