as39953
as39953
05-03-2021
Mathematics
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how many one-digit integers are there
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baylimedley
baylimedley
05-03-2021
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.
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