A moneylender lends Rs.60 and collects Rs.66 at the end of four months. The rate of interest p.a. is​

Mr. Abhishek borrowed Rs. 600 and returned Rs. 856.60 at the end of 9 years and 6 months. What was the interest per annum he paid at simple interest ?

If the compound interest on a certain sum for 2 years is Rs. 60.60 and the simple interest is Rs. 60, then the rate of interest per annum is

A sum of Rs. 1600/- gives a simple interest of Rs. 252/in 2 years and 3 months. The rate of interest per annum is:

A sum of Rs. 1600 gives a simple interest of Rs. 252 in 2 years and 4 months. The rate of interest per annum is: