In a test, minimum passing percentage for girls and boys is 30% and 45% respectively. A boy scored 280 marks and failed by 80 marks. How many more marks did a girl require to pass in the test if she scored 108 marks?

A worker suffers a 20% cut in his wage. He may regain his original wages by obtaining a rise of how much %?

Manoj gave 60% of his salary to his wife and invested rest amount in mutual funds. His wife spends 30% amount on grocery and 20% on rent. From remaining amount, she purchased gold worth Rs. 18000. Find salary of Manoj.

Ram spends 20% of his monthly income on his household needs, 15% of the remaining income on books and 30% of the remaining income on clothes. Now he has Rs 9520 left, so what is his monthly income?

In a factory 60 % of the workers are above 30 years and of these 75 % are males and the rest are females. If there are 1350 male workers above 30 years, the total number of workers in the factory is: 

The value of an article depreciates every year at the rate of 10% of its value. If the present value of the article is  Rs 729, then its worth 3 years ago was

Population of a town increases by 12% every year. If the population of town will be 188160 after 2 years, then what is its present population?