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Factorials
The factorial of a number is the product of all the whole numbers, except zero, that are less than or equal to that number. For example, to find the factorial of 7 you would multiply…Finding Volume
Cube V = a3, in which a is the length of one of the sides.Rectangular Prism V = abc, in which a is the length, b is the width, and c is the depth.Sphere V = (4πr3)/3, in which π is about 3.…Finding Perimeter and Circumference
Perimeter The perimeter of a geometrical figure is the complete distance around that figure. To find the perimeter, simply add up the lengths of the figure's sides. Example: What is the…Triangles
A triangle has three sides and is made of straight lines. A triangle may be classified by how many of its sides are of equal length. Or, it may be classified by what kind of angles it has.…Finding Area
Square A = a2, in which a is one of the sides.Rectangle A = ab, in which a is the base and b is the length.Parallelogram A = bh, in which b is the base and h is the height.Circle A = πr2, in…World's Largest Known Prime Number
Euclid proved in the 3rd century BC that there are an infinite number of prime numbers. A prime number can be divided only by itself and the number 1. Primes serve as the building blocks…Finding Square Roots
The easiest way to find a square root is to use a calculator, but you can do it without one. Here’s one way, using 12 as an example of the squared number:Pick a number that when squared,…Order of Operations
When you have a math problem that involves more than one operation—for example, addition and subtraction, or subtraction and multiplication—which do you do first? Example #1: 6 – 3 x 2 = ? Do you…Factors
A whole number that can be divided cleanly into another whole number is called a factor of that number. Example: Factors of 10 10 can be evenly divided by 1, as 10 ÷ 1 = 10 10 can be…Prime Factors
Some numbers can be evenly divided only by 1 and themselves. These are prime numbers. Factors that are prime numbers are called prime factors. Every whole number greater than one is either a…Trending
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