Zap writes down every whole number between 1 and 40. How many times will he write the digit 3?
A 13 B 14 C 15 D 16 E 17
B
Writing down all the numbers between 1 and 40 that have a 3 in them and counting them is one way of doing it. Another way would be to say that there is one between 0 and 10, one between 11 and 20, one between 21 and 29, then 10 for every one from 30 to 39, plus one extra for 33, giving 14 in all, answer B
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