Three-digit numbers start at 100. Two-digit numbers start at 10. So out of 1 - 99, the first 9 don't count. That leaves 99 - 9 = 90.
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There are 5 numbers of 1 digit, 25 numbers of 2 digits, and 75 numbers of 3 digits. This makes 105 numbers in all.
there are 89 twodigits in whole numbers
Not 2 numbers - 2 digits. The digits 0 and 1.
Exactly 2: 243 of them.
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