Simple Interest Questions

FACTS  AND  FORMULAE  FOR  SIMPLE  INTEREST  QUESTIONS

 

 

1. Principal: The money borrowed or lent out for a certain period is called the principal or the sum.

 

2. Interest: Extra money paid for using other's money is called interest

 

3. Simple Interest (S.I.) : If the interest on a sum borrowed for a certain period is reckoned uniformly, then it is called simple interest.

Let Principal = P, Rate = R% per annum (p.a.) and Time = T years. Then,

(i)  S.I=P×T×R100

(ii)  P=100×S.IR×T ; R=100×S.IP×T and T=100×S.IP×R

Q:

Simple interest on a sum of Rs 67400 for 14 months is Rs 4718. What is the rate (in percentage) of interest per annum?

A) 5.5 B) 6
C) 8 D) 7
 
Answer & Explanation Answer: B) 6

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5 1235
Q:

A certain sum of money becomes double of itself in 15 years at a rate of simple interest. In how many years will it become 5 times of itself at the same rate of simple interest

A) 45 B) 37.5
C) 75 D) 60
 
Answer & Explanation Answer: D) 60

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3 1231
Q:

A sum of money of Rs. 1000 is lent out in two parts in such a way that the interest on one part at 10% per annum for 5 years is equal to another at 5% for 10 years. Calculate the sum lent out at 5%.

A) Rs. 500 B) Rs. 800
C) Rs. 1000 D) Rs. 1200
 
Answer & Explanation Answer: A) Rs. 500

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0 1226
Q:

The difference between simple and compound interests compounded annually on a certain sum of money for 2 years at 4% per annum is Rs 8. The sum is ______.

A) Rs 10000 B) Rs 20000
C) Rs 5000 D) Rs 15000
 
Answer & Explanation Answer: C) Rs 5000

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2 1218
Q:

Simple interest on a certain sum of money for 3 years at 8% per annum is half the compound interest on Rs 1200 for 2 years at 10% per annum. The sum placed on simple interest is

A) Rs 525 B) Rs 1050
C) Rs 260 D) Rs 420
 
Answer & Explanation Answer: A) Rs 525

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Q:

Simple interest on a certain sum of money for 3 years at 18% per annum is half the compound interest on Rs. 9000 for 2 years at 10% per annum. The sum placed on simple interest is:

A) Rs 3500 B) Rs 875
C) Rs 1750 D) Rs 1400
 
Answer & Explanation Answer: C) Rs 1750

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Q:

M borrowed some money for 1 year at certain simple interest. But the interest rate was increased to 2% which amounted to Rs.120. Find the principal amount.

A) Rs.4000 B) Rs.5000
C) Rs.6000 D) Rs.7000
 
Answer & Explanation Answer: C) Rs.6000

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0 1204
Q:

A sum of money invested at simple interest becomes 13/10 of itself in 2 years and 6 months. What is the rate (in percentage) of interest per annum?

 

A) 10 B) 15
C) 12 D) 18
 
Answer & Explanation Answer: C) 12

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