Absolute value (or modulus) of an integer is the numerical value regardless of its sign.

Absolute value of an integer x is written as bars on either side of the expression i. e |x| and is defined as

             |X| = X if x ≥ 0

This is my first attempt in writing a note. Please give me your valuable comments and suggestion; of course correct me wherever I am wrong. This is my own writing and all the examples are original one.

"Factors" are the numbers you multiply to get another number.

Example: The factors of 20 are

I have just added a chapter on Number of divisors @ http://www.cat4mba.com/node/6030

I hope you ‘ll find it useful.