Important Time and Distance Basic Concepts, Formulas that will help you in different Competitive Exams.
Check the basics concepts of time, speed & distance, with special reference to the concept of average speed and relative speed.
Important Compound Interest Basic Concepts, Formulas that will help you in different Competitive Exams.
What is Compound Interest (C.I.)?
When the amount after the first unit of time becomes the Principal for the second unit of time and so on, after fixing a certain unit of time, say yearly or half-yearly or quarterly to settle the previous amount.
Learn the Basic Concepts and important formulas related to Simple Interest. These concepts and basic and advanced important formulas will help you in solving the problems of Simple Interest.
Learn the Basic Concepts and important formulas related to Time and Work. These concepts and basic and advanced important formulas will help you in solving the problems of Time and Work.
Learn the Basic Concepts and important formulas related to Pipe and Cistern. These concepts and basic and advanced important formulas will help you in solving the problems of Pipe and Cistern.
Ratio and Proportion
What do you mean by Ratio? In a ratio of a:b, ‘a’ is called the first term or antecedent, and ‘b’ is called the second term or consequent.
What do you mean by Proportion?
i.e., a × d = b × c
Trigonometric Identities and Formulas
There are three systems of measuring Angles-
1. Circular System
Unit of Measurement is radian.
180 degree = π radians
2. Sexagesimal System (English System)
Right angle is divided into 90 equal parts called degree.
Unit of Measurement is degree.
3. Centesimal or French System
Right angle is divided into 100 equal parts.
A percent is derived from the Latin word ‘per centum’ which means ‘per hundred.
The percentage is a way of comparing quantities.
Percentages are basically numerators of fractions with denominator 100.
A percent is represented by the symbol – ‘%’.
Ex- 1% means 1 out of 100 or one-hundredths.
1% = 1/100 = 0.001
Interpreting Percentages
Ex- What do you mean by this statement. let say – “Raj saves 25% of his income.
Interpretation – It means 25 parts out of 100, or it means Raj is saving 25 rupees out of every 100 rupees that he earns.
Important Formula
% Change – (Increase or decrease)
℅change = (final value – Initial Value)*100/Initial Value