MATHS SIMPLE INTEREST AND COMPOUND INTEREST SHORTCUT TRICKS

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SIMPLE INTEREST AND COMPOUND INTEREST FAST CALCULATION TRICKS 

Hi friends,
In this post we are about to learn how to calculate simple interest and compound interest with some short tricks. In exams we don't have time to calculate on paper with formulas. we have to it in mind so quickly because Every second matter in examination hall.

Now, here are some shortcut tricks for Simple Interest (S.I) and Compound interest (C.I.) with these i think you sure have some help in these chapter

lets first thing to do is learn some PERCENTAGE basic.

SIMPLE INTEREST 


we have using these BASIC formulas

S.I. = PxRxT / 100

BUT there are some example how these shortcut tricks that

Type 1.

In how many years will a sum of money double itself at 12% per annum?
a. 6years 6 months
b. 7 years 6 months
c. 8 years 3 months
d. 8 years 4 months



Type 2.
 at what rate of percent of simple interest will a sum of money double itself in 12 years?
a. 8%
b. 8.1/3%
c. 8.1/2%
d. 9.1/2%



















Type 3.

The rate at which a sum become four times of itself in 15 years at simple interest will be?
a.15%
b. 17.1/2%
c. 20%
d. 25%


















Type 4.

if a sum of money at simple interest double in 6 years. it will become 4 time in ?
a. 12 years
b. 14 years
c. 16 years
d. 18 years




















Type 5.

How long will it take a sum of money invested at 5% p.a. by simple interest to increase it value by 40%?
a. 5 years
b. 6 years.
c. 7 years
d. 8 years















COMPOUND INTEREST SHORTCUT TRICKS


Type 1.
a sum of money place at compound interest double itself in 5 years. It will become 8 times itself at same rate of interest in ?
a. 7 years
b. 10 years
c. 15 years
d. 20 years






















Type2.

By C.I. at 10 % p.a. a sum increased to 2662 in 3 years what will be the principal amount ?
a. 1000
b. 1500
c. 2000
d. 2500





















Type 3.

In C.I, what will be the rate of interest if a sum becomes 1331 in 3 years?
a. 100
b.1000
c.10000
d. none of these


















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