Question
If the sum of upstream and downstream speed is 32 km/hr
and the speed of the current is 6 km/hr. Then find time taken to cover 44 km in downward?Solution
Let the speed of boat in still water be x km/hr. According to the question, => x + 6 + x − 6 = 32 => x = 16 Downstream speed = 6 + 16 = 22 km/hr Required time = 44/26 = 2 hrs
50 62 ? 96 126 138
...1,2, 5, ‘?’, 41, 122, 365
24 47 137 ? 2679 16049
...The series given below contains a sequence of numbers. Accordingly identify the incorrect number.
85, 84, 81, 88, 77, 92, 72
13Â Â Â Â Â Â Â Â Â Â 182Â Â Â Â Â Â Â Â 303Â Â Â Â Â Â Â Â 384Â Â Â Â Â Â Â Â 433Â Â Â Â Â Â Â Â ?
...171, 173, 183, 213 , ‘?’, 411, 633.
Given below are two numbers series 'I' and 'II' and each series has a wrong (odd one out) number. The number that should come in place of the wrong num...
35 36 68 207 836 4205
...89Â Â Â Â Â 78Â Â Â Â Â 74Â Â Â Â Â 67Â Â Â Â Â 63Â Â Â Â ?
31   48    67    90   ?      150
