Nikita invests ₹ 6,000 for two years at a certain rate of interest compounded annually. At the end of the first year, it amounts to ₹ 6,720. The rate of interest p.a. is:

1. 8%

2. 10%

3. 12%

4. 14%

The compound interest on ₹ 8,640 for 3 years at 8% p.a. is:

1. ₹ 2,345

2. ₹ 3,245

3. ₹ 3,425

4. ₹ 3,452

The simple interest on a sum of money for 2 years at 4% per annum is ₹ 340. The compound interest on this sum for one year payable half-yearly at the same rate is:

1. ₹ 170.70

2. ₹ 107.70

3. ₹ 171.70

4. ₹ 270.70

The compound interest on a certain sum of money at 5% p.a. for two years is ₹ 246. The simple interest on the same sum for three years at 6% p.a. will be:

1. ₹ 432

2. ₹ 430.50

3. ₹ 432.75

4. ₹ 431.75