No. A digit is a single number from 0 to 9
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Because -99 is a two digit number and it is smaller.10 is the smallest positive 2-digit number.Because -99 is a two digit number and it is smaller.10 is the smallest positive 2-digit number.Because -99 is a two digit number and it is smaller.10 is the smallest positive 2-digit number.Because -99 is a two digit number and it is smaller.10 is the smallest positive 2-digit number.
There are 9 digits that can be the first digit (1-9); for each of these there is 1 digit that can be the second digit (6); for each of these there are 10 digits that can be the third digit (0-9); for each of these there are 10 digits that can be the fourth digit (0-9). → number of numbers is 9 × 1 × 10 × 10 = 900 such numbers.
There are 9 x 10 x 10 x 10, or 9000 four-digit number that can be formed if the leading digit cannot be zero.
You cannot.First: 0 to 9 is not one digit but 10 digits.Second: You cannot change a numeric digit to a letter.You cannot.First: 0 to 9 is not one digit but 10 digits.Second: You cannot change a numeric digit to a letter.You cannot.First: 0 to 9 is not one digit but 10 digits.Second: You cannot change a numeric digit to a letter.You cannot.First: 0 to 9 is not one digit but 10 digits.Second: You cannot change a numeric digit to a letter.
10 + 15 = 25. the tens digit of 25 is 2