# Quantitative Aptitude: Simple Interest/Compound Interest Set 05

Simple Interest/Compound Interest Questions for IBPS PO, SBI PO, NIACL, NICL, LIC, Dena Bank PO PGDBF, BOI, Bank of Baroda and other competitive exams

1. A man with a sum of Rs3903 wants to deposit in the bank account of his two sons so that both will get equal money after 5yrs and 7yrs respectively at the rate of 4% compounded annually. Find the part of amount deposited into the account of first son?
A) 2028
B) 2400
C) 3000
D) 1250
Option A
Some Extra:

A( 1+4/100)5 = B(1+4/100)7
A/B = (1+4/100)² = 676/625
676+625 = 3903
1= 3
676 = 2028
2. The ratio of difference between compounded interest and simple interest for 3years to the difference between C.I and S.I for 2years is 31 : 10. What is rate of percent per annum ?
A) 20%
B) 25%
C) 16(2/3)%
D) 10%
Option D
Some Extra:

Principal
A A A
.  B B
.     B
.     C
Difference between C.I & S.I for 3yrs = 3B+C
Difference between C.I & S.I for 2yrs = B
Now …. (3B+C)/B = 31/10
B = 10
C = 1
Rate = C/B = 1/10 = 10%
3. A certain sum is lent for 3yrs at 10% compound interest p.a. if the C.I for the 3rd year is 242. Then what will be the S.I for 4yrs?\
A) 400
B) 800
C) 600
D) 1000
Option B
Some Extra:

R – 10% = 1/10 ….. (10)³ = 1000, let P=1000
.                      1000
100……………..100…………….100
.                       10……………….10
.                                              10
.                                                1
C.I for 3rd yr = 121
121 = 242
1 = 2
P = 1000 = 2000
S.I = 4*10 = 40% of 2000 = rs800
4. What will be the difference between compound interest on sum of 3000 for 1(1/2) yrs. When the interest is compounded annually and half yearly respectively if rate is 20% compounded annually?
A) 30
B) 33
C) 36
D) 39
Option B
Some Extra:

Compound Annually ……..C.I = 960
Compound half yearly ………. C.I = 993
Difference = 993 -960 = 33
5. If a principal becomes triple in 4yrs at C.I then find in how many years it will be nine fold?
A) 8yrs
B) 12yrs
C) 10yrs
D) 16yrs
Option A
Some Extra:

In C.I ‘P’ increases like…..
P……….3P………….9P
.       4            4
4+4 = 8yrs
6. If the difference between C.I and S.I at 20% rate of interest ‘is 480. Then find the principal amount?
A) 3600
B) 3750
C) 4000
D) 4750
Option B
Some Extra:

20% =1/5……….(5)T………=(5)³= 125=principal
In 3yrs difference will always come
3A + 1 = (3*5)+1 =16
16 = 480
1 =30
125 =3750
7. A sum of Rs13,360 was borrowed at 8(3/4)% p.a C.I and paid back in 2yrs in two equal installments. What was the amount of each installment?
A) 5769
B) 7569
C) 7009
D) 7500
Option B
Some Extra:

8(3/4) = 7/80
80/87 * 167/87 * installments =13360
Installments = Rs7569
8. If a sum of Rs16 becomes Rs81 in 4yrs then find the rate of interest at compound interest?
A) 33(1/3)%
B) 40%
C) 50%
D) 66(2/3)%
Option C
Some Extra:

4√16 : 4√81
2 : 3
3 -2 = 1
1/2* 100 = 50%
9. Find the C.I on Rs20,000 at 15% rate of interest in 3yrs?
A) 10400.5
B) 10500.5
C) 10517.5
D) 10417.5
Option D
Some Extra:

.                 20000
SI for 1 year = 20000*15/100 = Rs 3000
3000…………………..3000……………………3000
.                                450……………………..450
.                                                                 450
.                                                                 67.5
= 9000 + 1350 + 67.5 = 10417.5
10. S.I on a sum for 3yrs at any rate of interest is 450 while C.I on the same sum at the same rate for 2yrs is 315. Find the sum and rate percent?
A) 5% , 1500
B) 10%, 1500
C) 5%,2000
D) 10%,2000
Option B
Some Extra:

.                    P
1st yr150…………….. 2nd yr150
……………………………………………….15
15 = 10% of 150
So R = 10%
P = 1500

## 10 Thoughts to “Quantitative Aptitude: Simple Interest/Compound Interest Set 05”

1. Sachin Shukla

ty

2. Diya

A men sells his table at a profit of 25% and chair at a loss of 20% but on whole he gains rs 18. On the other hand , if he sells the table at a loss of 20% and a chair at a profit of 25% , then he neither gain nor loss. Find the cost price of chair and table.

1. Oliver Queen

Table-200rs
Chair-160rs

2. Oliver Queen

Table 200rs
chair 160rs

3. Diya

Ram buys 4 horses and 9 cows for rs 13400. If he sells the horse at 10% profit and the cows at 20% profit , then he earns a total profit of 1880 . The cost price of a horse is?

1. Oliver Queen

2000rs
?

4. Diya

Ambika ma’am please solve these questions………….

5. M@nish...

awesome tricks thanks az …but in 6th how come 3 year in solution

6. ~lonely~hanker~nitrous oxide~

tq mam

7. kumkum ahuja

3.ty:)