• In many cultures no 13 is considered unlucky, well,there are many myths around it .One is that In some ancient European religions, there were 12 good gods and one evil god; the evil god was called the 13th god.Other is superstition goes back to the Last Supper. There were 13 people at the meal, including Jesus Christ, and Judas was thought to be the 13th guest.

• Have you heard about Fibonacci? It is the sequence of numbers wherein a number is the result of adding the two numbers before it! Here is an example: 1, 1, 2, 3, 5, 8, 13, 21, 34, and so on

• Want to remember the value of Pi (3.1415926) in easy way ? You can do it by counting each word's letters in 'May I have a large container of coffee?'

• Have you heard about a Palindrome Number? It is a number that reads the same backwards and forward, e.g. 12421