The difference between compound interest for a year payable half-yearly and simple interest on a certain sum of money lent out at 10% for a year is ₹ 15. Find the sum of money lent out.

The ages of Pramod and Rohit are 16 years and 18 years respectively. In what ratio must they invest money at 5% p.a. compounded yearly so that both get the same sum on attaining the age of 25 years ?

The difference between C.I. and S.I. at 10% in 2 years on ₹ 100 is:

1. ₹ 1

2. ₹ 41

3. ₹ 00

4. none of these