## Properties of Median

Properties of Median

The median is a segment that starts at one of the 3 vertices of the triangle and ends at the midpoint of the opposing base.

In the below figure the three medians are Ma=AP, Mb=BQ and Mc=CR.

## Permutations and Combinations

Guys we had a good discussion on Man Hour Work and Time speed Distance. Lets move to the new chapter Permutations and Combinations.

I think it ‘ll be a good idea to solve the questions on these chapters together.  So start posting questions on these two chapters.

Thanks!!!

Note : You can find the basic notes on Permutations @ http://www.cat4mba.com/math-e-book/permutations

## Next chapter: Percentage

For those who are knew The Idea is to solve 20,000 + cat level questions in maths and DI and all the questions on English zone/GK available on this site (I guess new questions/tests are added regularly)

In maths we have had some good discussion on number system and reminders, now let’s move to the next chapter: Percentage

E Book Chapter with basics of percentage: http://www.cat4mba.com/e-book/percentages

Question Bank: http://www.cat4mba.com/question_bank?filter0=65

Forum Topic: http://www.cat4mba.com/forum/307

## Different ways of calculating reminder

After going through all the reminder chapters/notes on this site I made few points on calculating reminder. Here I am trying to put all those points together so that while approaching the reminder questions we can follow a certain pattern.

Question: what is the reminder when M is divided by N.

1. First Check if N is prime if so then use Fermat’s Little theorem.

## Fermat's little Theorem

If p is a prime then for any integer a we have

ap = a modulo p.

i.e.  If p is a prime and n is an integer then np–n is divisible by p.

## Modulus (Absolute value) of an integer

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

## Factors and their properties

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

## Schedule for - Target CAT 08

I have created a timetable. It’s just the date on which we ‘ll start new chapters. Target is to cover everything by end of june w/o rushing into things.I think one should purchase at least 2 of the 4 books mentioned below and we ‘ll also discuss IMS/TIME/CL with all the questions on the site.Books:1. Nishit K. Sinha2. K.Kundan/P.Pandey3. Sarvesh Verma4. Arun Sharma

21-JAN-08 Number System01-FEb-08 Divisibility Rules05-FEB-08 Reminder Theory10-FEB-08 LCM & HCF