Downstream speed of the boat = 143/11 = 13 km/hr Upstream speed of the boat = 120/12 = 10 km/hr Speed of boat in still water = (13 + 10)/2 = 11.5 km/hr
3, 10, 29, 66, ?
40 41 37 46 ? 55 19
...4 10 ? 62.5 156.25 390.625
...1, 7, 25, 61, ?
625, 125, 375, 75, 225, 45, ?
58, 63, 78, ?, 138, 183
98, 134, 198, ?, 442, 638
58, 67, ?, 76, 40, 85
4097, ?, 4359, 4493, 4629, 4767
What will come in place of the question mark (?) in the following series?
2, 5, 14, 41, 122, 365, ?
