# APTITUDE

## Compound Interest – basics, definition, formula, questions

Compound Interest definition If the interest is paid on the principal as well as specific time such as yearly , half-yearly, quarterly to settle the previous amount is called compound interest CI = A-P p = principal r = rate n = time When interest is compounded annually A= When interest is compounded half-yearly A= …

## Simple Interest – basics, definition, formula, questions

INTEREST Extra money paid for using bought money is called interest SIMPLE INTEREST This interest is termed as simple interest because it is always calculated for initial money PRINCIPAL The money lent out for a certain period is called the principal SIMPLE INTEREST FORMULA P=PRINCIPAL R=RATE OF INTEREST S.I=SIMPLE INTEREST N=NUMBER OF YEARS Principal of …

## L.C.M AND H.C.F – basics, definition, formula, questions

L.C.M L.C.M full form Least common multiple or Lowest Common Multiple which is exactly divisible by each one of the given numbers is called a L.C.M For example Find the lcm of 90,150,225,450,750,1125 ? ANSWER = 2250 H.C.F (or) G.C.D (OR) G.C.D H.C.F full form Highest Common Factor (or) G.C.D full form Greatest common Division …

## Number Series – basics, definition, formula, questions

UNITS OF TIME 1 minutes = 60 seconds 1hour = 60 minutes 1 hour = 3600 seconds 1 days = 24 hours 1 days = 1440 minutes 1 days = 86,000 seconds 1 second = minutes 1 minutes = hours MEASUREMENT OF LENGTH 10 Millimetre = 1 Centimetre 100 Centimetre = 1 Metre 1000 Metre …

## Percentage – basics, definition, formula, question

Percentage : சதவீதம் of = multiple ன் = multiple Percentage example PERCENTAGE FRACTION DECIMAL NUMBERPERCENTAGE FRACTION 8% 0.08 15% 0.15 23% 0.23 37% 0.37 45% 0.45 183% 1.83 292% 2.92 753% 7.53 1284% 12.84 81987% 819.87 654321% 6543.21 DIFFERENT DECIMAL PERCENTAGE EXAMPLE DECIMAL PERCENTAGE FRACTION 12.2 232.22 1.242 25.3456 QUESTION 01 Find the value of …

## Simplification – basics, definition, formula, questions

‘BODMAS’ RULE : The rule depicts correct sequence in which the operations are to be executed, so as to find our the value of a given expression. B Bracket O Of D Division M Multiplication A Addition S Subtraction BODMAS CALCULATION METHOD IMPORTANT FORMULA QUESTION 01 QUESTION 02 QUESTION 03 QUESTION 04 QUESTION 05 QUESTION …

## Ratio and Proportion – basics, definition, formula, problems

Ratio : விகிதம் Proportion : விகித சமம் Ratio a:b (or) Proportion a:b::c:d (or) Types Of Proportion First Proportion Second Proportion Third Proportion Fourth Proportion Mean Proportion QUESTION 01 Find the missing term ___:2=3:6 ? (or) If x:2 :: 3:6 Then x is equal to (or) Find the value of first proportion ?:2 :: 3:6 (or) …