Puzzle: Count 0s

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A certain street has 1000 buildings. A sign-maker is contracted to number the houses from 1 to 1000. How many zeroes will he need?
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Sangeeta Haldhar Sangeeta Haldhar   12 years ago

1- 100 - 11
101- 200 - 20
201 - 900 - 140
901 - 999 - 21

192

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