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Q: How many times does the digit 9 appear in the whole numbers at least once?

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11 times

As a digit in other numbers it appears 20 times

18

It appears 25 times.

20000 times

A total of 44 times.

18 times

200

200

16

Assuming you mean in the numbers 1, 2, 3, ..., 998, 999, 1000 then the digit 0. (The digit 1 appears 301 times, the digits 2-9 all appear 300 times each, but the digit 0 only appears 192 times.)

140

700000

If 11 and 111 is counted as 1 digit, the answer is 119.If 11 is counted as 2 digit 1's, the answer is 131.

Including the one in ' 1 ' and the one in '100', there are 21 1s.Every other digit 2 - 9 appears 20 times between 1 and 100 .

The digit '6' appears most often (two times). The other digits only appear once.

19 times.

11 times

Single digit numbers is not correct. Squares of numbers will appear odd number of times in a multiplication table: 1², 2², 3², 4², 5², 7², etc....

1 digit number: only 1 number 2 digits number: 18 numbers 3 digits number: 76 So there are 95 numbers containing 9.

16000

3897

first digit time second digit and second digit times first digit then repeat

67 times

300 times.