A man invests in a 16% stock at 128. The interest obtained by him is (a) 8%          (b) 12%         (c) 12.5%       (d) 16%

At simple interest a sum becomes (49)/(40) of itself in 2 1/2 years. The rate of interest per annum is (a) 7% (b) 8% (c) 12% (d) 9%

A man invested Rs 1552 in a stock at 97 to obtain an income of Rs 128. The dividend from the stock is (a) 7.5% (b) 8% (c) 9.7% (d) None of these

The interest earned on Rs15000 in 3 years at simple interest is Rs 5400. Find the rate of interest per annum (a) 11.5% (b) 12% (c) 12.5% (d) 15%

At what rate percent per annum simple interest will a sum double itself in 10 years? (a) 8% (b) 10% (c) 12% (d) 12 1/2%

At which rate percent per annum simple interest will a sum triple itself in 16 years? (a) 12% (b) 10.5% (c) 11.5% (d) 12.5%

An amount of Rs 10000 becomes Rs 14641 in 2 years if the interest is compounded half-yearly. What is the rate of compound interest p.c.p.a.? (a) 10% (b) 12% (c) 16% (d) 20% (e) None of these

a. 13% of 300 km b. 16% of 625 litres

? an 16%=.008

200 is 16% of what number?