Q51. Simantika sold two radios for Rs. 2000 each. On one she gains 16 % and on the other she losses 16 %. Find her gain or loss per cent in the whole transaction.
Q52. 48 % of the first number is 60 % of the second number. What is the ratio of the first number to the second number ?
Q53. The product of two consecutive odd numbers is 6723. What is the greater number?
Q54. What is the value of two-fifth of 60 % of 320 ?
Q55. Average of 5 numbers is 50. If every number is multiplied by 2, find the average.
Q56. A boat is rowed down stream at 35 Km./hr. and up stream at 17 km./hr. Find the speed of the stream.
Q57. By selling a bicycle for Rs. 2200, a man gains 10%. At what price did he buy the bicycle?
Q58. A number when added to its half gives 63. Find the number.
Q59. Find out the missing number (?) in the series. 1, 1, 2, 6, 24, ?, 720
Q60. 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.