Question
John travelled a total distance of 432 km. He covered
5/8 of this distance at a constant speed of 30 km/h. To complete the entire journey in 13.5 hours, what speed must he travel the remaining distance at?Solution
(5/8) of 432 km = 270 km So, time taken to travel 270 km = 270 ÷ 30 = 9 hours Remaining distance = 432 - 270 = 162 km Remaining time = 13.5 - 9 = 4.5 hours So, speed at which remaining distance is to be travelled = 162 ÷ 4.5 = 36 km/h
35 36 68 207 836 4205
...6 3.5 2.5 ? 8.5 23.75
...16, 54, 128, ‘?’, 432,686
7   24    43    66   ?      126
35    57    101    189    ?     717
130 114 106 102 100 ?
43Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â 44Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â 48Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â ...
If  2  4  6  x  14  28  30
Then, x³+ 2 x+1 = ?
17 ? 33 44 57 72
...35Â Â Â Â Â Â Â Â Â Â 36Â Â Â Â Â Â Â Â Â Â 40Â Â Â Â Â Â Â Â Â Â 49Â Â Â Â Â Â Â Â Â Â 65Â Â Â Â Â Â Â Â Â Â ?
...
