Daft Dave has been hired to paint the house numbers on a recently completed housing estate.
There are one hundred houses and therefore Dave has to paint all of the numbers from 1 to 100.
How many times will Dave have to paint the number nine?
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9, 19, 29, 39, 49, 59, 69, 79, 89, 90, 91, 92, 93, 94, 95, 96, 97, 98, 99.
Don’t forget to count both of the nines in 99.
Hence, answer = 20 times