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Q: How many 3 digit numbers containing at least one digit of 7?

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18

six

252

252

Infinitely many.

27: 077,177,277,377,477,577,677,877,977,717,727,737,747,757,767,777,787,797

There are 90 two digit numbers, 10 through 99. There are 18 two digit numbers containing a 9. They are 19, 29, 39, 49, 59, 69, 79, 89, and 90 through 99. Therefore, there are 72 two digit numbers that do not contain a 9.

how does 100 meet the specification? 1 is in the hundreds digit and 0 is in the tens digit. 1 is not at least 0. this is a confusing question?!

46000

There are 61328 of them.

No digit that is 5 places long is equal to 6 times 2 other than 12.000

1234

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