Q: How many whole numbers have exactly four digits?

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If the digits are all different then 18. Otherwise, 192.

If you're asking for 4 digit numbers where all four digits are odd, then the lowest number possible is 1111, and the highest is 9999. You only have 5 digits to work with. The answer is: 54 - 53 = 625 - 125 = 500.Subtract the 5 cubed for the numbers less than 1111, which are not four digits.

500

Whole numbers are divisible by 4 if the number formed by the last two individual digits is evenly divisible by 4. For example, the number formed by the last two digits of the number 2628 is 28, which is evenly divisible by 4 so the number 2628 is evenly divisible by 4.

There are no four odd numbers that will add up to nineteen.

Related questions

10,000

Any pair of digits (not including 0), can be used to generate 14 four-digit numbers. If one of the digits is 0, only seven will start with a non-zero digit.

1234, 2637, 7777, 2727 are examples of a four digit number. So any random four numbers are four digits.

18 of them.

5*5*4*4 = 400

you take the four digits and multiply 4 by 4 you get 16 digits

45

If the last two digits of a number are divisible by four, the whole number is divisible by four.

It is usually 4 digits. Some banks offer pin numbers that are more than 4 digits long.

94

In representing large numbers, English texts use commas (or spaces) to separate each group of three digits. This is almost always done for numbers of six or more digits, and optionally for five (or even four) digits. This makes it easier to read the number without having to count how many place holders there are in the number as a whole.

If the digits are all different then 18. Otherwise, 192.