Other formulas Simple interest formula:

Principal: is a  money  borrowed or lent  for a certain time  period

Interest: Additional money paid for using other’s money

Amount:   It is the sum of the Principal and Interest

Simple interest is always calculated on the principal. Interest depends on the rate of interest, Principal and period of the loan.

If P= Principal      Rate of Interest =R %      T=Time period(years)

Then

Simple Interest = P*R*T/100

                                                                             Rules of Divisibility

The rules of divisibility will help you find which numbers divide others without leaving any remainder:

Divisibility by 2,  5, 10

A number is divisible by

If the last digit is

2

0,2,4,6,8

5

0,5

10

0

Divisibility by 3 and 9

A number is divisible by

If the sum of digits is divisible by

3

3

9

9

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