Question
A’ and ‘B’ together can complete a work in 18 days
while ‘A’ takes 36 days to complete the same work alone. If ‘C’ is 50% more efficient than ‘B’, then find the time taken by ‘C’ alone to complete the whole work.Solution
Let the total work = 36 units Efficiency of (A + B) = 36/18 = 2 units/day Efficiency of ‘A’ = 36/36 = 1 unit/day Therefore, efficiency of ‘B’ = 2 – 1 = 1 units/day Efficiency of ‘C’ = 1.5 × 1 = 1.5 units/day Required time taken = 36/1.5 = 24 days
864, 432, 144, ? , 7.2, 1.2
What will come in place of the question mark (?) in the following series?
22, 28, 37, ?, 72, 102
Find the missing term in the series:
4, 7, 13, 25, 49, ?
168, 178, ?, 273, 400, 618, 963
Find the missing number in the given number series.
2, 7, 19, 62, ?, 1270Â
What value should come in the place of (?) in the following number series?
4913, 2197, ?, 343, 125, 27
36   37    33   42    ?      51    15
...150 Â Â Â 15Â Â Â 3Â Â Â ? Â Â Â Â 0.36Â Â Â Â 0.18
81, 83, 87, 95, 111, ?
What will come in place of the question mark (?) in the following series?
11, 18, 32, 60, ?, 228
