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question_answer1) A housewife saved Rs 2.5 in buying an item on sale. If she spent Rs 25 for the item, then approximately how much percent she saved in the transaction?
question_answer2) If x% of y is 100 and y% of z is 200, then find the relation between x and z.
question_answer3) In an examination, 34% of the students failed in Mathematics and 42% failed in English. If 20% of the students failed in both the subjects, then find the percentage of students who passed in both the subjects.
question_answer4) If\[\mathbf{x:y=1:3,}\]then find the value of \[\mathbf{(7x+3y):(2x+y)}\mathbf{.}\]
question_answer5) In a mixture 60 litres, the ratio of milk and water 2: 1. If the this ratio is to be 1:2, then the quantity of water to be further added is:
question_answer6) Salaries of Ravi and Sumit are in the ratio 2: 3. If the salary of each is increased by Rs 4000, the new ratio becomes 40: 57. What is Sumit present salary?
question_answer7) If 40% of a number is equal to two-third of another number, then what is the ratio of first number to the second number?
question_answer8) A tyre has two punctures. The first puncture alone would have made the tyre flat in 9 minutes and the second alone would have done it in 6 minutes. If air leaks out at a constant rate, then how long does it take both the punctures together to make it flat?
question_answer9) A can do a piece of work in 4 hours. A and C together can do it in just 2 hours, while B and C together need 3 hours to finish the same work. In how many hours B can complete the work?
question_answer10) Two fill pipes A and B can fill a cistern in 12 and 16 minutes respectively. Both fill pipes are opened together, but 4 minutes before the cistern is full, one pipe A is closed. How much time will the cistern take to fill?
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