In English we use the word combination loosely, without thinking if the order of things is important. In other words:

Find out how many different ways to choose items. For an in-depth explanation of the formulas please visit Combinations and Permutations.

Combinations and Permutations. Combinations and Permutations Calculator.

A lottery is a type of gambling where people buy tickets, and then win if their numbers get chosen. A lot is something that happens by chance.

A really interesting Number Patterns is Pascalapos;s Triangle (named after Blaise Pascal, a famous French Mathematician and Philosopher).

Here are some really useful applications to speed your way to that all-important solution.

The factorial function (symbol: !) says to multiply all whole numbers from our chosen number down to 1. Examples:

☐ Definition of Permutation ☐ Combinations and Permutations ☐ Combinations and Permutations Calculator ☐ Calculate the number of possible combinations (nCr) of n items taken r at a time …

Trigonometry: from Greek trigonon triangle + metron measure. Want to learn Trigonometry? Here is a quick summary. Follow the links for more, or...

A binomial is a polynomial with two terms. What happens when we multiply a binomial by itself ... many times? a+b is a binomial (the two terms...