Category: Numbers

Venn diagrams are used throughout math, science, and other disciplines to express ideas in a visual way.  Once you know what they are and why to use them, you can figure out how to solve...

Perfect numbers are an interesting concept in number theory.  To understand them, we need to find the divisors of an integer, take their sum, and see how that sum compares to the integer. So,...

Usually we can recognize small perfect squares and find their square roots without too much trouble.  However, it is a little more work to find the square root of a number that is not a perfect...

Factorials are used throughout mathematics, in topics from algebra, analysis and calculus to probability and statistics.  As a result, it helps to have an idea of how this important concept is...

Finding the prime factors of a number helps us to find the least common denominator (LCD), which is useful for adding fractions.  Factoring a number into large prime factors is difficult, and...

Geometric sequences are used in mathematics whenever we have a sequence of numbers that grows or shrinks by a fixed percentage at each step.  However, there are a few things you should know...