In an examination, a student has to secure 40% marks to pass. One student got 40 marks and failed by 40 marks. What was the total marks in the examination?

A fruit seller sells 30% apples and still has 630 apples in the stock. How many apples had he bought?

If A's salary is 110% of B's salary is 80% of C's find salary, if A's salary is Tk. 440.

On selling an article for a certain price, a man loses 30%. What is his loss/profit percent, if lie sells the...

Area of a square filed is 729 square meter. Find its parameter.

A man sold a horse at 10% profit. Had he bought it at 20% less and sold for Tk. 10 more, he would have made a...

A and B can do a piece of work in 12 days while A alone can do it in 20 days. How long will B alone take to fi...