What is the present value of rs. `6000` receivable after two years at a discount rate of `5%` under continuous discounting ?

What single discount is equivalent to two successive discounts of 25% and 5%?

What is the discount percentage equivalent to three successive discounts of 12%, 10% and 5%?

Find the single discount which is equivalent to two successive discounts of 20% and 5%.

The marked price of a watch was Rs. 720/-. A man bought the same for Rs. 550.80, after getting two successive discounts, the first at 10%. What was the second discount rate?