Interest Compounded Half yearly and Quarterly

Find the difference between the compound interest on 25,000 at 16% per annum for six months compounded half yearly and quarterly respectively.Which option is better.

The difference of compounds interest on Rs. 800 for 1 year at 20% per annum when compounded half yearly and quarterly is :

The different between the compound interest on a sum of ₹ 8,000 for 1 year at the rate of 10% per annum, interest compounded yearly and half yearly is:

A sum of Rs. 2500 is invested for 2 years at 20% per annum, interest compounded half-yearly. Find the compound interest.

A sum of Rs 5000 is invested at a scheme of compound interest. The interest rate is 20%. If the interest is compounded half yearly, then what is interest (in Rs) after 1 year?