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Quantitative Aptitude > Interest

SIMPLE & COMPOUND INTEREST MCQs

Compound Interest, Simple Interest, Interest (combined)

Total Questions : 1171 | Page 101 of 118 pages
Question 1001. 4000 was divided into two parts such a way that when first part was invested at 3%
and the second at 5%, the whole annual interest from both the investments is
Rs.144, how much was put at 3%?
  1.    Rs.2500
  2.    Rs.2700
  3.    Rs.2800
  4.    Rs.5000
 Discuss Question
Answer: Option C. -> Rs.2800


(x*3*1)/100 + [(4000 - x)*5*1]/100 = 144

3x/100 + 200 “ 5x/100 = 144

2x/100 = 56 ¨ x = 2800


Question 1002. If Re.1 amounts to Rs.9 over a period of 20 years. What is the rate of simple interest?
  1.    26 2/3 %
  2.    30 %
  3.    27 1/2%
  4.    40 %
 Discuss Question
Answer: Option D. -> 40 %


8 = (1*20*R)/100

R = 40%


Question 1003. A sum of money becomes triple itself in 5 years at simple interest. How many
years will it become six times at the same rate?
  1.    12 1/2 years
  2.    12 years
  3.    11 1/2 years
  4.    11 years
 Discuss Question
Answer: Option A. -> 12 1/2 years


100 ---- 200 ---- 5

             200 ---- 5  
                                      

             100 ---- 2 1/2

             ------------------


              600 ---- 12 ½ years


Question 1004. A sum of money becomes double itself in 8 years at simple interest. How many
times will it become 10 years at the same rate?
  1.    2 1/4
  2.    4 1/4
  3.    5 1/4
  4.    None
 Discuss Question
Answer: Option A. -> 2 1/4


P ---- 2P ---- 8 years

2 1/4 P ---- 10 years


Question 1005. In how many years will a sum of money doubles itself at 5% per annum on simple interest?
  1.    22 years
  2.    20 years
  3.    21 years
  4.    29 years
 Discuss Question
Answer: Option B. -> 20 years


P = (P*5*R)/100


R
= 20%


Question 1006. A part of certain sum of money is invested at 9% per annum and the rest at 12% per annum, if the interest earned in each case for the same period is equal, then ratio of the sums invested is?
  1.    2:3
  2.    3:4
  3.    4:3
  4.    None
 Discuss Question
Answer: Option C. -> 4:3


12:9 

= 4:3


Question 1007. The equal amounts of money are deposited in two banks each at 15% per annum for 3.5 years and 5 years respectively. If the difference between their interests is Rs.144, find the each sum?
  1.    Rs.3467
  2.    Rs.640
  3.    Rs.500
  4.    None
 Discuss Question
Answer: Option B. -> Rs.640


(P*5*15)/100 - (P*3.5*15)/100 = 144

75P/100 “  52.5P/100 = 144


22.5P = 144 * 100

=> P = Rs.640


Question 1008. A sum of Rs. 2665 is lent into two parts so that the interest on the first part for 8 years at 3% per annum may be equal to the interest on the second part for 3 years at 5% per annum. Find the second sum?
  1.    Rs.1678
  2.    Rs.1640
  3.    Rs.2341
  4.    None
 Discuss Question
Answer: Option B. -> Rs.1640


(x*8*3)/100 = ((2665 - x)*3*5)/100

24x/100 = 39975/100 - 15x/100

39x = 39975 => x = 1025


Second sum = 2665 “ 1025 = 1640


Question 1009. If A lends Rs.3500 to B at 10% per annum and B lends the same sum to C at 11.5% per annum then the gain of B in a period of 3 years is?
  1.    Rs.107.50
  2.    Rs.115.50
  3.    Rs.157.50
  4.    Rs.177.50
 Discuss Question
Answer: Option C. -> Rs.157.50


(3500*1.5*3)/100 =>
157.50


Question 1010. A person lent a certain sum of money at 4% per annum at simple interest and in 8
years the interest amounted to Rs.340 less than the sum lent. What was the sum
lent?
  1.    Rs.400
  2.    Rs.450
  3.    Rs.550
  4.    Rs.500
 Discuss Question
Answer: Option D. -> Rs.500


P - 340 = (P*4*8)/100


P = 500


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