The given equation has been solved on the basis of a certain rule. Find the correct answer for the unsolved equation on that basis:
If a ÷ b = (a + b) ÷ (a – b) then (16 ÷ 4) × (42 ÷ 7)
(16 ÷ 4) × (42 ÷ 7) = [(16+4)÷(16-4)] × [(42+7)÷(42-7)] = [20÷12] × [49÷35] = 20/12 × 49/35 = 7/3
4 5.5 19 .5 98.5 694 6251.5
...15 13 28 24 54 52
...1 5 13 25 41 ?
31 48 67 90 ? 150
100 221 77 245 50 275
3601 3602 1803 604 154 36
...2, 17, 147, 1167, 8157, 48957
D irection: Which of the following will replace ‘?’ in the following series
9, ‘?’, 1242, 1581, 1783
...2120 1976 2097 1997 ? 2014
...4 6 12 ? 44 74
...
