Q21. What is the value of two-fifth of 60 % of 320 ?
Q22. Average of 5 numbers is 50. If every number is multiplied by 2, find the average.
Q23. A boat is rowed down stream at 35 Km./hr. and up stream at 17 km./hr. Find the speed of the stream.
Q24. By selling a bicycle for Rs. 2200, a man gains 10%. At what price did he buy the bicycle?
Q25. A number when added to its half gives 63. Find the number.
Q26. Find out the missing number (?) in the series. 1, 1, 2, 6, 24, ?, 720
Q27. A sum of money lent at simple interest becomes Rs. 3224.00 in 2 years and Rs. 4160.00 in 5 years. Find out the sum.
Q28. A, B, and C working together can finish a piece of work in 8 hours. A alone can do it in 20 hours and B alone can do it in 24 hours. In how many hours will C alone can do the same work?
Q29. A man bought a cow for Rs. 850.00 and sold it at a gain of 8%. For how much did he sell the cow?
Q30. A car is running at an average speed of 42 kilometres per hour. What time will it take to cover a distance of 350 metres?