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OpenStudy (anonymous):
A printer is typesetting a book. He needs one piece of type for each digit in the page numbers of the book. Each piece of type can be used only once. For example, page 3 and page 33 will require 3 pieces of type. How many twos will he need to number pages 1 through 232
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OpenStudy (anonymous):
87 pieces of type
OpenStudy (anonymous):
Its 87 pieces of type 2's in the ones place: 2, 12, 22, 32, ... 232 = 24 2's
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