Q1 · medium · AI-verified
A sum of money doubles itself in 8 years at simple interest. What is the rate of interest?
- 12.5%
- 10%
- 15%
- 8%
Q2 · medium · AI-verified
If the simple interest on a sum for 6 years is 3/8 of the principal, what is the rate percent per annum?
- 6.25%
- 5.5%
- 7%
- 8%
Q3 · medium · PYQ 2025
Rohan invests a portion of a total sum of ₹P in scheme A for 4 years and the remaining amount in Scheme B for 5 years. Scheme A offers a simple interest rate of r% per annum, while Scheme B offers a simple interest rate of (r + 2)% per annum. The amount invested in Scheme A is 50% more than the amount invested in Scheme B. If the total interest earned from both schemes is ₹1,920 and the amount invested in Scheme A is ₹2,400, what is the simple interest rate, r?
- 12%
- 15%
- 5%
- 10%
Q4 · medium · AI-verified
If ₹6,000 amounts to ₹7,800 in 3 years at simple interest, what is the rate percent per annum?
- 10%
- 12%
- 8%
- 9%
Q5 · medium · AI-verified
A person invests ₹12000 at 9% simple interest per annum. After how many years will the total interest earned be ₹4320?
- 4 years
- 3 years
- 5 years
- 6 years