16.
The bankers discount on Rs. 1800 at 12% per annum is equal to the true discount on Rs 1872 for the same time at the same rate. Find the time.

17.
The true discount on a bill of Rs. 2160 is Rs. 360. What is the banker's discount?

18.
The bankers discount and true discount on a sum of money due 8 months hence are Rs.120 & Rs.110 resp. Find the sum.

19.
The banker's discount on Rs. 1650 due a certain time hence is Rs. 165. Find the true discount and the banker's gain

20.
A bill for Rs. 6000 is drawn on July 14 at 5 months. It is discounted on 5th October at 10%. Find the banker's discount, true discount, banker's gain and the money that the holder of the bill receives.