A certain sum of money amounts to ₹ 5000 at the end of 5th year and to ₹ 6000 at the end of 6th year. The rate of interest is :

1. 120%

2. 20%

3. 1.2%

4. 12%

At the end of 2020, the compound interest amounted to ₹ 3850 at 10% C.I. The C.I. on the same sum and at same rate amounted at the end of 2019 was :

1. ₹ 3500

2. ₹ 4235

3. ₹ 3181

4. ₹ 3182

For two consecutive years, a sum lent out at C.I. earns ₹ 600 and ₹ 690 respectively. The rate of C.I. is :

1. 12%

2. 18%

3. 15%

4. 5%

For two consecutive years, a sum of money lent out at C.I. amounts to ₹ 2400 and ₹ 2760 respectively. The rate of interest is :

1. 5%

2. 15%

3. 18%

4. 10%