## Tips and Tricks on Alligation

Alligation:It is the rule that enables us to find the ratio in which two or more ingredients at the given price must be mixed to…

## Problem solving tricks on sales and discount

IMPORTANT CONCEPTS Suppose a man has to pay Rs. 156 after 4 years and the rate of interest is 14% per annum. Clearly, Rs. 100…

## Tips and Tricks on Bank Account

IMPORTANT CONCEPTS Banker’s Discount: Suppose a merchant A buys goods worth, say Rs. 10,000 from another merchant B at a credit of say 5 months.…

## Tips and Tricks To Solve Problems on Races and Games

Races: A contest of speed in running, riding, driving, sailing or rowing is called a race. Race Course: The ground or path on which contests are made…

## Missing Letter Puzzle for Interviews, Placement and Competitive Exams

MISSING LETTER PUZZLES Answer : K Explanation : The numerical values of the letters in opposite segments of the circle always add up to 17.…

## Missing Number puzzles: Interviews, Placements and Competitive Exams

MISSING NUMBER PUZZLES   Answer : 6 Explanation : Looking at the diagram in rows, the central circle equals half the sum of the numbers…

## Shortcuts on Square Roots and Cube Roots

Square Roots and Cube Roots To find the square root of a number, you want to find some number that when multiplied by itself gives you the…

## Lateral Thinking Puzzles

LATERAL THINKING PUZZLES LATERAL THINKING:The solving of problems by an indirect and creative approach, typically through viewing the problem in a new and unusual light.…

## Important algebra identities and questions

Some Basic Formulae: (a + b)(a – b) = (a2 – b2) (a + b)2 = (a2 + b2 + 2ab) (a – b)2 = (a2 + b2 – 2ab) (a + b + c)2 = a2 + b2 + c2 + 2(ab + bc + ca) (a3 + b3) = (a + b)(a2 – ab + b2) (a3 – b3) = (a – b)(a2 + ab + b2) (a3 + b3 + c3 – 3abc)…

## Tips and Tricks to solve aptitude problems on Mixtures and Alligation

Alligation:It is the rule that enables us to find the ratio in which two or more ingredients at the given price must be mixed to…