An author received Taka 0.80 in royalties for each of the first 100,000 copies of his book sold, and Taka 0.60 in royalties for each additional copy sold. If he received a total of Taka 260,000 in royalties, how many copies of his book were sold?

If 8 dozens of bananas are purchased at the rate of Taka 30 per dozen and 12 dozens are purchased at Taka 25 p...

If the interest on Taka 500 for 4 years and Taka 600 for 5 years is Taka 500; what will be the rate of interes...

In a city 40% of the people have black hair, 25% have black eyes and 10% have both black hair and black eyes....

A sum of Taka 3000 invested at 4% per annum for a number of years earned Taka 300 interest. What is the time p...

A jar contains black and white marbles. If there are ten marbles in the jar, all of the following could be the...

Two students appeared at an examination. One of them secured 9 marks more than the other and his marks was 56%...