A: ### Quick Answer

**There are 90,000 different number combinations that can be made in a five-digit number if numbers can repeat.** To determine the number of possibilities, each place digit has to be evaluated independently to see how many numbers could fit there and then all are multiplied together.

A five-digit number has five different place settings which can take on various values. The first digit can take on nine values, from 1 to 9. For the second through fifth digits any number between 0 and 9 can be used. To find the total number of combinations, these values are then multiplied together: 9 x 10 x 10 x 10 x 10 = 90,000 total combinations.

Learn more about NumbersSources:

- Q:
## Is pi a real number?

A:

Full Answer >**Pi is a real number, as all numbers that exist on a number line are real.**Real numbers include all rational and irrational numbers; pi is defined as an irrational number.Filed Under: - Q:
## What are some facts about the number 16?

A:

Full Answer >**The number 16 is an even number and is the only integer that has the form x**Another fact is that the base 16, or hexadecimal system, is a notational system for expressing real numbers used in computer science. The 16 digits it uses to represent numbers are the numbers 0-9 and the letters A-F.^{y}=y^{x}, where x and y are different numbers (2 and 4).Filed Under: - Q:
## How can you find consecutive odd numbers?

A:Consecutive odd numbers are any two odd numbers with only one even number between them. To find a pair of consecutive odd numbers when given their sum, set up the equation 2x + 2 to equal the sum. Solve it for the variable "x."

Full Answer >Filed Under: - Q:
## What is a negative minus a negative?

A:

Full Answer >**A negative minus a negative is equal to another negative number, a positive number or zero, depending upon the numbers in the equation.**Subtracting a negative number from another negative number is the same thing as adding a positive number.Filed Under: