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

Links for 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

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