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90

10-20=10

20-30=10

30-40=10

40-50=10

50-60=10

60-70=10

70-80=10

80-90=10

90-99=9

Thus, the answer is actually 89 two-digit numbers between 1 and 100. You do not count 100 itself because it is NOT a two-digit number, it is a three-digit number. On top of that, you begin your counting at 10, since 10 is the FIRST two-digit number in the sequence. Then the answer should be sligtly more clear.

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15y ago

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90

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Santosh Handral

Lvl 2
8mo ago
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91

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Wiki User

12y ago
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Q: How many 2 digit numbers from 1- 100?
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