A: ### Quick Answer

**A number story is a short story that illustrates a math equation, making it easier for young students to understand the equation involved.** For example, the equation 5+2=7 can be told as a story about five birds sitting on a tree that were joined by two more birds.

Teachers sometimes ask students to describe simple equations in the form of a number story. Besides increasing the child's understanding of the equation and encouraging creativity, the activity can also be used to improve a child's drawing skills by illustrating the story. Number stories are typically written or drawn for simple arithmetic operations such as addition and subtraction. Some examples of number stories include:

- There were two children at home and then one went out to play. Now there is only one child in the house.
- Andrew had four toy cars. His aunt gave him two more for Christmas. Now he has six.

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## What is a very hard math equation?

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Full Answer >**An extremely difficult math equation is the Jacobi-Madden equation, a**The Jacobi-Madden equation is considered a Diophantine equation.^{4}+ b^{4}+ c^{4}+ d^{4}= (a + b + c + d)^{4}where variables a, b, c and d can be any positive integer, negative integer or zero.Filed Under: - Q:
## Why are prime numbers important in math?

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Full Answer >**Prime numbers are important in mathematics because they function as indivisible units and serve as the foundation of several mathematical disciplines.**Because a prime number is a natural number greater than 1 that can only be divided by itself and 1, all non-prime numbers, which are called composite numbers, can be factored into a unique set of prime numbers. Computer security programs and cryptology are two fields that have made use of prime numbers to code and decode sensitive information.Filed Under: - Q:
## What is Phi in math?

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Full Answer >**Phi is the 21st letter of the Greek alphabet and in mathematics, it is used as a symbol for the golden ratio.**The golden ratio refers to a special number that is approximately equal to 1.618. It is also known as the golden section, golden mean, divine section, medial proportion, golden cut, extreme and mean ratio, golden number or divine proportion.Filed Under: - Q:
## What does interval mean in math?

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Full Answer >**In mathematics, the term "interval" usually refers to a statistical confidence interval.**Confidence intervals describe the likelihood of a statistical estimate being correct. Higher confidence intervals mean better chances that the estimate is correct, while lower confidence intervals mean better chances that the estimate is incorrect or flawed.Filed Under: