Question
A boat covers 315 km upstream in 7 hours and 525 km
downstream in 7 hours. Find the time taken by the boat to cover 420 km in still water.Solution
Upstream speed = 315 / 7 = 45 km/hDownstream speed = 525 / 7 = 75 km/hSpeed in still water = (45 + 75) / 2 = 60 km/hRequired time = 420 / 60 = 7 hours
What will be the next number in the series?
2,5,11,23,47,?
12, 23, 68, 271, 1354, ?
24, 33, 50, ?, 108, 149
Direction: Which of the following will replace ‘?’ in the given question?
342, ‘?’, 420, 462, 506, 552, 60
16 18 14 20 12 ?
...The question below is based on the given series I. The series I satisfy a certain pattern, follow the same pattern in series II and answer the questions...
85    135    172    ?     215    225
Complete the series choosing the missing number.
8, 13, 20, ____, 40.
1 2 9 ? 65 126
...6Â Â Â Â Â Â Â Â Â Â Â Â Â Â 3Â Â Â Â Â Â Â Â Â Â Â Â Â Â 24Â Â Â Â Â Â Â Â Â Â Â 218Â Â Â Â Â Â Â Â Â 3486Â Â Â Â Â Â Â 43575
10      �...
