True Discount - General Questions

The true discount on a bill due 3 year(s) hence at 5% per annum is Rs. 780. What is the amount of the bill?

What is the present worth of Rs. 520 due in 1 year(s) at 4% per annum simple interest?

What is the present worth of Rs. 3,410 due in 2 year(s) at 5% per annum simple interest?

Find the true discount on Rs. 3,348 due 2 year(s) hence at 12% per annum.

What is the present worth of Rs. 6,120 due in 2 year(s) at 10% per annum simple interest?