Simple & Compound Interest(Quantitative Aptitude > Interest ) Questions and answers for exam Preparation

Quantitative Aptitude > Interest

SIMPLE & COMPOUND INTEREST MCQs

Compound Interest, Simple Interest, Interest (combined)

Total Questions : 1171 | Page 100 of 118 pages

Question 991. A sum of money amounts to Rs. 9800 after 5 years and Rs. 12005 after 8 years at the same rate of simple interest. The rate of interest per annum is?

Discuss Question

Answer: Option C. -> 12%

S.I. for 3 years = (12005 - 9800) = Rs. 2205
S.I. for 5 years = Rs. 2205/3 * 5 = Rs. 3675.Principal = (9800 - 3675) = Rs. 6125Hence, rate = (100 * 3675) / (6125 * 5) = 12%

Question 992. A sum of money at simple interest amounts to Rs. 815 in 3 years and to Rs. 854 in 4 years. The sum is?

Rs. 650
Rs. 690
Rs. 698
Rs. 700

Discuss Question

Answer: Option C. -> Rs. 698

S.I. for 1 year = (854 - 815) = Rs. 39S.I. for 3 years = 39 * 3 = Rs. 117Principal = (815 - 117) = Rs. 698.

Question 993. The rate of interest on a sum of money is 4 % per annum for the first 2 years. 6 % per annum for the next 4 years and 8 % per annum for the period beyond 6 years. If the simple interest accrued by the sum for a total period of 9 years is Rs. 1120, what is the sum?

Rs. 1500
Rs. 2000
Rs. 2500
Rs. 4000

Discuss Question

Answer: Option B. -> Rs. 2000

Sum = Rs. x.
=> =1120
=> 56 x = 112000
=> or x = 112000/56 = 2000

Question 994. At which sum the simple interest at the rate of 3 ¾ % per annum will be Rs. 210 in 2 1/3 years?

Rs.1580
Rs.2400
Rs.2800
None of these

Discuss Question

Answer: Option B. -> Rs.2400

= Rs(100 x 210 x 12/105) = Rs.2400

Question 995. How much simple interest will Rs. 2000 earn in 18 months at 6 % per annum?

Rs. 120
Rs.180
Rs.216
Rs.240

Discuss Question

Answer: Option B. -> Rs.180

S.I = Rs(2000 x 18/12 x 6/100) = Rs.180

Question 996. A man deposited Rs. 400 for 2 years. Rs.550 for 4 years and Rs.1200 for 6 years. He received Rs.1020 as the total simple interest. The rate of interest per annum is?

8 %
10 %
15 %
20 %

Discuss Question

Answer: Option B. -> 10 %

Let the rate of interest be R % p.a. Then

=> 800 R + 2200 R + 7200 R = 102000
=> 10200 R = 10200
=> R = 10

Question 997. A sum of money amounts to Rs.5200 in 5 years and to a Rs.5680 in 7 years at simple interest. The rate of interest per annum is?

Discuss Question

Answer: Option D. -> 6 %

S.I for 2 years = Rs(5680 - 5200) = Rs 480
S.I for 1 year = Rs.(480/2) = Rs.240
S.I for 5 years = Rs.(240 x 5) = Rs. 1200
Therefore, Principle = Rs.(5200 - 1200) = Rs. 4000
Therefore, Rate = (120000/20000) % p.a = 6 % p.a

Question 998. If x is the interest on y and y is the interest on z, the rate and time is the
same on both the cases. What is the relation between x, y and z?

xyz = 1
X2 = yz
Y2 = xz
Z2 = xy

Discuss Question

Answer: Option C. -> Y2 = xz

X = (Y*NR)/100 Y =
(Z*NR)/100

X/Y = NR/100 Y/Z = NR/100

X/Y = Y/Z

Y² = XZ

Question 999. Sonika deposited Rs.8000 which amounted to Rs.9200 after 3 years at simple interest. Had the interest been 2% more. She would get how much?

Rs.9680
Rs.9860
Rs.9380
Rs.9800

Discuss Question

Answer: Option A. -> Rs.9680

(8000*3*2)/100 = 480

9200

--------

9680

Question 1000. Rs.2500 is divided into two parts such that if one part be put out at 5% simple interest and the other at 6%, the yearly annual income may be Rs.140. How much was lent at 5%?