How many one-digit integers are there

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asked Jun 10, 2022 205k views

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Abbas Mulani · Answer 1 · 2022-06-15T08:38:50+0000

the even ones are 2, 4, 6, 8. There are 4 of them. 2-digit integers: 10, 12, ..., 98 (45 of these), but in 4 of them (22, 44, 66, 88) the two digits are the same. So there are 45 − 4 = 41 even 2-digit integers with distinct digits.

How many one-digit integers are there

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