This set of Aptitude Questions and Answers (MCQs) focuses on “Simple Interest”. These questions are beneficial for various competitive exams, placement interviews, and entrance tests.
1. A man invested x rupees for 5 years at a rate of 2.5% simple interest. If he received an interest of 125000 after 5 years, find the amount he invested.
a) 10,00,000 rupees
b) 12,25,000 rupees
c) 50,00,000 rupees
d) 1,00,00,000 rupees
View Answer
Explanation: The amount he received after 5 years as interest = 125000 rupees, which implies he received 125000 / 5 = 25000 rupees interest each year.
The interest percentage = 2.5% of the amount he invested.
2.5% = 25000, 100% = 25000 / 2.5 * 100 = 10,00,000
The amount he invested = 10,00,000 rupees.
2. A man invested x rupees for 7.5 years at a rate of 6.5% simple interest. If he received a total of 125000 after 5 years, find the amount he invested.
a) 84034 rupees
b) 83404 rupees
c) 80434 rupees
d) 84043 rupees
View Answer
Explanation: Let the amount he invested be x.
The total amount that the man received = interest + the amount he invested = x + x * 7.5 * 6.5 / 100
X + x * 6.5 * 7.5 / 100 = 125000, x + 0.4875x = 125000, 1.4875x = 125000, x = 125000 / 1.4875 = 84033.61 rupees ≈ 84034 rupees.
3. A man invested x rupees for 7 years at a rate of 8.8% simple interest. If the amount he received after 7 years was 404000 rupees, find the amount he invested.
a) 2,50,000 rupees
b) 2,75,000 rupees
c) 2,85,000 rupees
d) 3,05,000 rupees
View Answer
Explanation: The amount he invested = x rupees.
The amount he received = x + x * 7 * 8.8 / 100 = x + 0.616x = 1.616x = 404000 rupees.
1.616x = 404000 rupees, x = 2,50,000 rupees.
The man invested 2,50,000 rupees.
4. A man invested x rupees for 11 years at a rate of 12.2% simple interest. If the amount he received after 11 years was 1826760 rupees, find the amount he invested.
a) 7,20,000 rupees
b) 7,80,000 rupees
c) 8,40,000 rupees
d) 9,20,000 rupees
View Answer
Explanation: The amount he received after 11 years = the amount he invested + the interest he received = x + x * 11 * 12.2 / 100 = x + 1.342x = 2.342x
The amount he received = 1826760 rupees = 2.342x
X = 1826760 / 2.342 = 7,80,000 rupees.
5. A man invested x rupees for 10.5 years at a rate of 21.6% simple interest. If the amount he received after 10.5 years was 2127468 rupees, find the amount he invested.
a) 6,51,000 rupees
b) 7,28,000 rupees
c) 8,37,000 rupees
d) 8,82,000 rupees
View Answer
Explanation: The amount he received after 10.5 years = the amount he invested + the interest he received = x + x * 10.5 * 21.6 / 100 = x + 2.268x = 3.268x = 2127468 rupees.
The amount he received = 21,27,468 rupees = 3.268x, x = 21,27,467 / 3.268
X = 6,51,000 rupees.
6. A man invested x rupees for 7.7 years at a rate of 13.3% simple interest. If the amount he received after 7.7 years was 23,68,197 rupees, find the amount he invested.
a) 11,45,000 rupees
b) 11,70,000 rupees
c) 12,45,000 rupees
d) 12,70,000 rupees
View Answer
Explanation: The amount he received = The amount he invested + the interest he received on the amount = x + x * 7.7 * 13.3 / 100 = x + 1.0241x = 2.0241x = 23,68,197 rupees.
2.0241x = 23,68,197 rupees, x = 23,68,197 / 2.0241 = 11,70,000 rupees.
7. A man invested x rupees for 8 years at a rate of 9% simple interest. If the amount he received after 8 years was 26,00,640 rupees, find the amount he invested.
a) 12,15,000 rupees
b) 15,12,000 rupees
c) 12,00,120 rupees
d) 15,00,150 rupees
View Answer
Explanation: The amount he received after 8 years = the amount he invested + the interest he received on the amount = x + x * 8 * 9 / 100 = x + 0.72x = 1.72x = 26,00,640 rupees
1.72x = 26,00,640 rupees, x = 26,00,640 / 1.72 = 15,12,000 rupees.
8. A man invested x rupees for 17 years at a rate of 33% simple interest. If the amount he received after 17 years was 45,00,088 rupees, find the amount he invested.
a) 6,80,000 rupees
b) 6,88,000 rupees
c) 6,80,800 rupees
d) 6,80,808 rupees
View Answer
Explanation: The amount he received after 17 years = the amount he invested + the interest he received on the amount he invested = x + x * 17 * 33 / 100 = x + 5.61x = 6.61x = 45,00,088 rupees
6.61x = 45,00,088 rupees, x = 45,00,088 / 6.61 = 6,80,800 rupees.
9. A man invested x rupees for 23 years at a rate of 0.9% simple interest. If the amount he received after 23 years was 30,41,640 rupees, find the amount he invested.
a) 25,00,000 rupees
b) 25,20,000 rupees
c) 25,40,000 rupees
d) 25,80,000 rupees
View Answer
Explanation: The amount he received after 23 years = the amount he invested + the interest he received on the amount he invested = x + x * 23 * 0.9 / 100 = x + 0.207x = 1.207x.
The amount he received = 1.207x = 30,41,640 rupees, x = 30,41,640 / 1.207 = 25,20,000 rupees.
10. A man invested x rupees for 19 years at a rate of 37% simple interest. If the amount he received after 19 years was 90,15,281 rupees, find the amount he invested.
a) 11,22,300 rupees
b) 11,22,700 rupees
c) 12,21,000 rupees
d) 13,35,000 rupees
View Answer
Explanation: The amount he received after 19 years = the amount he invested + the interest he received on the amount he invested = x + x * 19 * 37 / 100 = x + 7.03x = 8.03x = 90,15,281 rupees
8.03x = 90,15,281 rupees, x = 90,15,281 / 8.03 = 11,22,700 rupees.
More Aptitude Questions and Answers on Simple Interest:
- Simple Interest Questions (Set 2)
- Simple Interest Questions (Set 3)
- Simple Interest Questions (Set 4)
- Simple Interest Questions (Set 5)
- Simple Interest Questions (Set 6)
- Simple Interest Questions (Set 7)
- Simple Interest Questions (Set 8)
To practice all aptitude questions, please visit “1000+ Quantitative Aptitude Questions”, “1000+ Logical Reasoning Questions”, and “Data Interpretation Questions”.
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