1. The true discount on a bill due 10 months hence at 6% per annum is Rs. 26.25. The amount of the bill is:

2. The simple interest and the true discount on a certain sum for a given time and at a given rate are Rs. 25 and Rs. 20 respectively. The sum is:

3. A man buys a watch for Rs. 195 in cash and sells is for Rs. 220 at a credit of 1 year. If the rate of interest is 10% the man: