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How many 2-digit numbers have the digit 7 at least once?

How many 2-digit numbers have the digit 7 at least once?
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4 votes
How many 2-digit numbers have the digit 7 at least once?

User Ctrlz
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2 Answers

5 votes
I think the answer is 19
User Finley
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8.4k points
2 votes

Answer:

18. There are 18 two-digit numbers containing 7.

User Juergen Klasen
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9.2k points
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