There are 20 fives between 1 and 100. This can be calculated by dividing 100 by 5, which equals 20. The numbers 5, 10, 15, 20, 25, 30, 35, 40, 45, 50, 55, 60, 65, 70, 75, 80, 85, 90, 95, and 100 are all multiples of 5 within that range.
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5, 15, 25, 35, 45, 50, 51, 52, 53, 54, 55, 56, 57, 58, 59, 65, 75, 85, 95. By counting them, there are twenty 5s between 1 and 100.
100/5= 20
101
Not including 1 and 100, 99
There are 90 two-digit whole numbers between 1 and 100.
There are 49 numbers between 1 and 100 that are divisible by two.