A pen was sold at 15% loss. If the selling price was Tk 8 more, then the seller could have made a profit of 10%. What was the purchase price of pen?

If n and p are both odd numbers, which of the following must be an even number?

What fraction of an hour elapses between 11 : 40 p.m. and 12 : 20 a.m.?

A car wash center washes 10 cars in half an hour. At this rate how many cars can it wash in 4 hours?

If x + y = 6, y + z = 4 and z + x = 2, then 2y - z - x?

Out of total profit, A gets 40%, B 25%, C 20%, D 10% and E 5%. What percentage of A's profit is that of B?

In redesigning a cold storage, the length is increased by 30%, the breadth is increassed by 50% and the height...