COMPOUND INTEREST

A. Compound Interest: Sometimes it so happens that the borrower and the lender agree to fix up a certain unit of time, say yearly or half-yearly or quarterly to settle theprevious account.
In such cases, the amount after first unit of time becomes the principal for the second  unit, the amount after second unitbecomes the principal for the third unit and so on.

B. After specified period, the difference between the amount and the money borrowed is called the Compound Interest (abbreviated as C.I.) for that period.

Let  Principal P,
Rate R% per annum,
Time= n years.
Totally The Concept Of Compound Interest Is Based On the Above three.

C.  When interest is compound annually:
Amount = P(1+R/100)n

D.      When interest is compounded Half-yearly:
Amount = P[1+(R/2)/100]2n

E.  When interest is compounded Quarterly:
Amount P[ 1+(R/4)/100]4n

F.  When interest is compounded AnnuaI1y but time is in fraction, say3(2/5) years.
Amount P(1+R/100)3 x (1+(2R/5)/100)

G. When Rates are different for different years, say Rl%, R2%,R3% for 1st, 2nd and 3rd year respectively.
Then, Amount = P(1+R1/100)(1+R2/100)(1+R3/100)

Present worth of Rs.x due n years hence is given  by : Present Worth =x/(1+(R/100))n

Arithmetic Quiz For Railway And SSC CGL Exams

Railway NTPC – 2016  Expected Bits For CBT Exam

Quant Quiz :: Compound Interest Important Basic Formulas For SSC CGL And Railway Ntpc Exams Reviewed by SSC-IBPS on 14:27:00 Rating: 5