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:

The simple interest on a sum is 7/8 of the principal for 5 years. What is the rate (in percentage) of interest per annum?

 

A) 15 B) 17.5
C) 14 D) 22.5
 
Answer & Explanation Answer: B) 17.5

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Q:

What will be the maturity value, if Rs. 13,500 is deposited at a simple rate of interest of 12.5% for two years?

A) Rs. 15,187.50 B) Rs. 16,875.00
C) Rs. 16,875.50 D) Rs. 16,785.00
 
Answer & Explanation Answer: B) Rs. 16,875.00

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Q:

Rs. x invested at 8% simple interest per annum for 5 years yields the same interest as that on Rs. y invested at 7.5% simple interest per annum for 6years. Find x : y.

A) 40:45 B) 5:6
C) 16:15 D) 9:8
 
Answer & Explanation Answer: D) 9:8

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Q:

Puneet lent out Rs 30000 in two parts, one at 5% and the other at 9% interest. The yearly average interest comes out to be 6%. What are the amounts (inRs) that are lent at 5% and 9% respectively?

 

A) 20000, 10000   B) 22500, 7500  
C) 18000, 12000   D) 21000, 9000
 
Answer & Explanation Answer: B) 22500, 7500  

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Q:

The difference between simple interest on a certain sum at the rate of 6% per annum for 5 years and 6 years is 25.8. What is the sum (in Rs)?

 

A) 480 B)  430
C) 258 D) 516
 
Answer & Explanation Answer: B)  430

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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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Q:

A sum of Rs 800 becomes Rs 1000 in 2 years at simple interest. What is the per annum rate of interest (in percent)?

 

A) 12.5   B)  25  
C)  8.5   D)  17
 
Answer & Explanation Answer: A) 12.5  

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Q:

Find the approximate simple interest on Rs. 2000 from March 9, 2010 to May 21, 2010 at 8.25% per annum.

A) Rs. 43 B) Rs. 37
C) Rs. 33 D) Rs. 40
 
Answer & Explanation Answer: C) Rs. 33

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