1.
An employ sell a t.v for Rs.9000/- with 10% simple interest for 5 years on an installment basis. Then How much amount he paid for each installment?
Answer: Option 'B'
Instalment = 100 × P/100 × T+T × (T - 1)R/2
= 100 × 9000/100 × 5+5 × (5-1)10/2
= 100 × 9000/6000 = Rs.1500/-
2.
Find simple interest on Rs.6000/- at 10% p.a. for 2years 3 months?
Answer: Option 'A'
2 years 3months = 27/12 = T
P = Rs.6000/-
R = 10%
I = (6000 × 27/12 × 10)/100 = 27 × 50
I = Rs.1350/-
3.
Find simple interest on Rs.5000/- at 12% p.a. for 73days?
Answer: Option 'B'
73 days = 73/365 = T
P = Rs.5000
R = 12%
I = (5000*73/365*12)/100 = 120/-
I = Rs.120/-
4.
A person took some amount with some interest for 1 years, but increase the interest for 2%, he paid Rs.60/- extra, then how much amount he took?
Answer: Option 'A'
Only 1 year = 60/1 = 60
Rate of Interest = 2%
100/2% × 60 = Rs.3000/-
P = Rs.3000/-
5.
At what rate of percent per annum will a sum of money double in 8 years?
Answer: Option 'B'
Let principal be Rs P. Then, S.I = Rs P and Time = 8 years>
Rate = (100 × S.I)/(P × T) = (100 × P/P × 8)% p.a
= 25/2 % p.a = 12.5% p.a
6.
A borrow took by a man, for every 8 years it will be 3 times, then what is the rate of the interest?
Answer: Option 'C'
P = 1 , I = 2 , T = 8years R = ?
I = PTR/100
2 = 1×8×R/100
R = 25%
7.
A man took some money for borrowed, for 2 years the total will be Rs.9000/- and 5 years it will be13, Rs.500/-. Then how much amount he borrowed?
Answer: Option 'B'
2 years --------> Rs.9000/-
5 years --------> Rs.13500/-
~ ~
-----------------------------
3 years ----> Rs.4500/-
1 year -----> Rs.1500/-
2years × Rs.1500/- = Rs.3300/-
P = Rs.9000/- - Rs.30000/- = Rs.6000/-
P = Rs.6000/-
8.
A person took some amount with some interest for 2 years, but increase the interest for 1%, he paid Rs.120/- extra, then how much amount he took?
Answer: Option 'B'
2 years = Rs.120/-
year = 120/2
Rate of Interest = 1%
100/1% × 120/2 = Rs.6000/-
P = Rs.6000/-
9.
A borrow took by a man, for every 12 years it will be 5 times, then what is the rate of the interest?
Answer: Option 'A'
P = 1 , I = 4 , T = 12years R = ?
I = PTR/100
4 = 1×12×R/100
R = 33 1/3%
10.
Find simple interest on Rs.4000/- at 15% p.a. for 9months?
Answer: Option 'D'
T = 9 months = 9/12 = 3/4
P = Rs.4000/- , R = 15%
I =(4000 × 3/4 × 15) /100 = 30 v 15 = Rs.450/-
I = Rs.450/-
11.
The borrow taken by a man, for every 6 years it will be 3 times, then how much time it will be taken For 8 times:
Answer: Option 'B'
(R)2% ------> 6 years
7/2% × 6 = 21 years
Answer = 21 years
12.
Find the principle, interest on Rs.1200 at 8% p.a. for 2 years?
Answer: Option 'B'
P = ?
T = 2 years
R = 8%
I = Rs.1200/-
I = PTR/100
P = 100I/TR
P = (100 × 1200)/(2 × 8)
P = Rs.7500/-
13.
In how many years will sum of Rs 4000 yield an interest of Rs.1080/- at 9% p.a?
Answer: Option 'B'
P = Rs.4000/-
T = ?
R = 9%
I = Rs.1080/-
I = PTR/100
T = I × 100/PR
T = (1080 × 100)/(400 × 9)
T = 3 years
14.
Find the principle, interest on Rs.900/- at 6% p.a. for 3 years?
Answer: Option 'A'
P = ?
T = 3 years
R = 6%
I = Rs.900/-
I = PTR/100
P = 100I/TR
P = (100 × 900)/(3 × 6)
P = Rs.5000/-
15.
Find the simple interest 0n Rs.3000/- at 5 1/3% p.a. for 2 ½ years?
Answer: Option 'C'
P = Rs.3000/-
T = 5/2 years
R = 16/3%
I = PTR/100
I = (3000 × 5/2 × 16/3)/100
I = 25 × 16 = Rs.400/-