ANSWERS: 2

That depends on the kind of paper, how much it weighs. The Astandards are related to the size of the paper. Example (metric units): A4 = 21,0 cm x 29,7 cm = 623,7 cm2 1 m2 = 100 cm x 100 cm = 10.000,00 cm2 10.000,00 cm2 : 623,7 cm2 = about 16 (sheets A4) standard photocopy paper weighs 80 g per m2, that is 10.000,00 cm2 of photocopy paper weigh 80 g >> 16 sheets A4 weigh 80 g >> 80 g : 16 sheets = 5 g per sheet >> 100 g : 5 g = 20 Result: 20 sheets of photocopy paper with 80g/m2 weigh 100 g.

Wiki says a typical A4 sheet weighs 5g 0.1kg=100g=20 sheets.
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