Question : The average of twelve numbers is 58. The average of the first five numbers is 56 and the average of the next four numbers is 60. The 10^th number is 4 more than the 11^th number and the 11^th number is one less than the 12^th number. What is the average of the 10^th and 12^th numbers?

Option 1: 58.5

Option 2: 59.5

Option 3: 59

Option 4: 58

Question : The average of ten numbers is 72. The average of the first four numbers is 69 and that of the next three numbers is 74. The 8th number is 6 more than the 9th number and 12 more than the 10th number. What is the average of the 8th and 9th numbers?

Option 1: 76

Option 2: 76.5

Option 3: 77

Option 4: 77.5

Question : The Rolling plan was implemented between which two five-year plans?

Option 1: Fourth and Fifth

Option 2: Sixth and Seventh

Option 3: Second and Third

Option 4: Fifth and Sixth

Question : A boy found that the average of 20 numbers is 35 when he mistakenly wrote the number '61' instead of '16'. What is the correct average of the 20 numbers?

Option 1: 32.75

Option 2: 37.25

Option 3: 34.75

Option 4: 34.25

Question : Directions: Which of the following interchange of numbers (not digits) would make the given equation correct?
16 × 5 ÷ 20 + 6 + 50 = 40

Option 1: 40, 50

Option 2: 6, 40

Option 3: 20, 40

Option 4: 5, 40