Nature and sign of the roots of a quadratic equation
Nature of the Roots As I mentioned earlier in the post “Roots of a quadratic equation” that Discriminant helps in determining the nature of the roots of a quadratic equation ax^2 + bx +...
Category: Number System
Roots of a Quadratic Equation
A quadratic equation is a polynomial equation of the second degree. In other words, a second degree polynomial in x equated to 0, where coefficient of x^2 =/=0 will be a quadratic equation. The general form is ax^2 + bx...
Squares of numbers from 1 to 30
For making your calculation faster you must remember the squares of numbers from 1 to 30. Here is a collection of squares which could be easily remembered. Sq. 1 = 1 ...
Speed up your calculation 1
All MBA exams require fast calculation. Even 5-10 seconds saved per question will save you enough time to solve 3-4 more problems ultimately resulting in a better score. So following things can be handy...
Last digit of a product of numbers with power.
Last digit of a product of any number of numbers is equal to last digit of product of last digits of all the numbers. So to find the last digit in this case first...
Last digit of a sum of numbers with power.
Last digit of a sum of any number of numbers is equal to last digit of sum of last digits of all the numbers. So to find the last digit in this case first...
Last digit of any power of a number
To find the last digit of any power of a number we should keep following in mind. 1. Last digit of any power number repeats after a certain interval say N. So N is...
How to deal with tricky quadratic and cubic equation
So today lets discuss how to solve the problems related to quadratic and cubic equations. Though these problems are simple but a bit tricky. Similar approach is required in each and every problem. First...
A small Divisibility Trick for any number
Sometimes it becomes very cumbersome to check the divisibility by the conventional methods specially in case of 7, 11, 13…. etc. Since the divisibility methods corresponding to these numbers takes good amount of time,...
Is √x² = x or -x or none.
Crawl through various forums of mathematics & MBA preparation and you will find people searching for a clue whether √x² = x or -x or what …. Now to solve this situation, always remember in...
