Find the amount and the compound interest on Rs. 8000 for 1years at 10% per annum, compounded half-yearly.

Amit borrowed Rs. 16000 at 17% per annum simple interest. On the same day, he lent it to Ashu at the same rate but compounded annually. What does he gain at the end of 2 years?

Find the amount of Rs. 406 for 18 months at 12% per annum, the interest being compounded semi-annually.

Kamal borrowed Rs. 57600 from LIC against her policy at 12% per annum to build a house. Find the amount that she pays to the LIC after 1years if the interest is calculated half-yearly.

Abha purchased a house from Avas Parishad on credit. If the cost of the house is Rs. 64000 and the rate of interest is 5% per annum compounded half-yearly, find the interest paid by Abha after one year and a half.