Question
A man rows upstream 16 km and downstream 24 km taking 8
hours each. Find the man’s speed in still water.   ÂSolution
Distance upstream= 16 km, time taken to row upstream = 8 hrs. Speed upstream = 16/8 = 2 km/hr. Distance downstream= 24 km, Time taken to row downstream = 8 hrs. Speed downstream = 24/8 = 3 km/hr. Man’s rate in still water = (3 + 2) * ½ = 2.5 kmph
124, 180, 108, 198, ?, 220
Find the missing term in the series:
3, 8, 19, 42, 89, ?
- What will come in place of the question mark (?) in the following series?
?, 162, 54, 18, 9, 3 168, 164, 155, 139, ?, 78
168, 178, ?, 273, 400, 618, 963
4    11     22     ?      56    79    106
...107    157    194    ?     237    247
...Find the missing term in the series:
4, 7, 13, 25, 49, ?
What value should come in the place of (?) in the following number series?
100, 149, 68, 189, ?, 245
Find the missing number (?) in the given number series.
1, 4, 10, 22, 46, ?
