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6
It will contain at least 12 digits
04,14,24,34,40,41,42,43,44,45,46,47,48,49,54,64,74,84,94.... OR 19 Digits
172
All of them are significant.
18.
California inmate ID numbers contain six digits.
There are nine numbers which contain only one digit. There are 90 numbers which contain two digits. There are 900 numbers which contain three digits. There is one number which contains four digits.Therefore, the number of digits is equal to (9x1)+(90x2)+(900x3)+4 = 2893 digits. If this includes spaces, there would be 999 spaces, therefore there would be 3892 keystrokes.
If the number can contain repeated digits, the answer is 800000. Without repetition, there are 483840.
1
How many digits in a fed referemce number?
How many strings of three digits are there? 000 to 999, or a total of 1000. How many strings of three digits contain the same three digits? That's 000, 111, 222 ... 999! ten in total. The difference is your answer: 1000-10 = 990.
The decimal expansion of a rational number always either terminates after finitely many digits or begins to repeat the same finite sequence of digits over and over. As 7.37 terminates after 2 digits it must therefore be rational.
Five digits.
The number 184 consists of 3 digits.
9 Digit
TWO digits are in the number 30, 3 and 0