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# What is a number model?

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### Quick Answer

**A number model is a sentence that shows how a series of numbers are related.** An example of a basic number model could be 12+3=15.

A number model is an equation that incorporates addition, subtraction, multiplication and division, which are used singularly or together. In an equation, the symbols for these functions will be listed as, "+," "-," "*" and "/." As long as each part of the equation is related using some kind of sign, the equation is considered a number model.

In order to be a number model, an equation must show equality. For example, the equation, "8 + 1" is not a number model because it lacks the equal sign. However, "8 + 1 = 9" is a number model.

Number models can also be used to discover the perimeters and area of shapes. These types of equations may be in numeric or word form. To find the area of a square, when "a" is the length of one side, the number model would be written as: "area = a * a." Notice that in this example, there is a multiplication sign and an equal sign present.

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Q:
## How many different combinations can be made in a five digit number?

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Full 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.Filed Under: -
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## What is the prime factorization of 72?

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Full Answer >**The prime factorization of 72 is 2**The prime factorization of a number involves determining the factors of a number that are also prime numbers and multiply together to equal the original number.^{3x}3^{2}, or 2 x 2 x 2 x 3 x 3.Filed Under: -
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## What are all the common multiples for 7 and 11 from 1 to 100?

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Full Answer >**The only common multiple of the numbers 7 and 11 from 1 to 100 is the number 77, according to the Math Warehouse calculator.**A multiple is the product of a number and another whole number. A common multiple of 7 and 11 must be larger than the two numbers.Filed Under: -
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## What is a prime factor in mathematics?

A:Prime numbers that, when multiplied, equal another number are said to be the “prime factors” of that number. For example, 2 and 7 are the prime factors of the number 14.

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