In an alloy, there is 12 % of copper, to get 69 kg of copper, how much alloy will be required? 

The price of sugar is increased by 20 %. If the expenditure on sugar has to be kept the same as earlier, the ratio between the reduction in consumption and the original consumption is: 

What percent decrease in salary would exactly cancel out the 20 percent increase? 

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?

If the price of petrol increases by 19% and Sunitha intends to spend only an additional 12 % on petrol, by what percent should she reduce the quantity of petrol purchased?

If A = 1300 and B = 1450, then B is approximately what percentage more than A?

In a exam, a student scores four marks for every correct answer and loses one mark for every wrong answer. If Rahul attempts all sixty questions and secures 130 marks, the no of questions Rahul attempted correctly is :