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Q: How many 3 digit numbers contain the digit 2 at least once?
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How many 3 digit numbers are there that contain at least 1 seven?

252


How many three digit numbers contain at least two sevens?

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


How many five-digit counting numbers contain at least one 6?

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How many seven digit numbers contain the number seven at least once?

To find the total number of seven-digit numbers that contain the number seven at least once, we can use the principle of complementary counting. There are a total of 9,999,999 seven-digit numbers in total. To find the number of seven-digit numbers that do not contain the number seven, we can count the number of choices for each digit (excluding seven), which is 9 choices for each digit. Therefore, there are 9^7 seven-digit numbers that do not contain the number seven. Subtracting this from the total number of seven-digit numbers gives us the number of seven-digit numbers that contain the number seven at least once.


How many five digit counting numbers contain at least one 6?

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How many 2 digit numbers contain the digit 4?

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How many 4 digit numbers contain the digit 5?

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How many 2-digit numbers contain digit 1?

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How many a 2 -digit numbers contain the digit 4?

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How many 2-digit numbers contain the digit 7 only once?

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How many 2-digit numbers contain the digit?

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If the houses on main street are numbered 1 to 150 how many house numbers contain a least one digit 91 and 4?

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