A digit is each number (0-9) that makes a number. For instance, 100 has three digits - one is the 1; two are zeros. There are 6 digits in 231,527.
0
Nine Thousand, Nine Hundred and Ninety Nine = 9,999 = Four digits.
5
Twelve thousand seven hundred written in numerals is 12, 700. This has 5 digits.
720
It has 1 followed by 25 0's.. therefore in total there is 26 digits
In the US, one billion is written as the numeral one followed by 9 zeros (1,000,000,000). So, in the US, a billion has ten (10) digits. A billion has a very different meaning in the UK.
The answer will depend on a standard US WHAT! But since you have not bothered to share that crucial bit of information, I cannot provide a more useful answer.
A 'digit' is a numeral - and we have ten of them — 0, 1, 2, 3, 4, 5, 6, 7, 8 and 9. After that we re-use them - 10 is not a digit, it is two digits put together.
4 x 3 x 2 = 24 of them
815*537 = 2.56*1039 in standard form Therefore it will have 40 digits.
The numbers from 1000 to 9999 are all 4 digits, as are -1000 to -9999. Therefore there are 18,000 four-digit numbers in all.