Question
A and B can complete a task together in 30 days, while B
alone takes 60 days to finish it. A began working alone and left after ‘x’ days, after which B completed the remaining work in 45 days. Determine the percentage of the total work completed by A.Solution
Let total amount of work be 60 unitsEfficiency of (A + B) = 60/30 = 2 units/dayEfficiency of ‘B’ = 60/60 = 1 unit/dayAmount of work done by ‘B’ = 45 × 1 = 45 unitsPercentage of work done by ‘A’ = {(60 – 45)/60} × 100 = 25%
612, 487,?, 396, 388, 387
Find the missing number in the given number series.
1, 2, 6, 24, 120, ?What will come in place of the question mark (?) in the following series?
36, 85, ?, 230, 330, 451
Find the missing term in the series:
2, 5, 11, 23, 47, ?
What will come in place of the question mark (?) in the following series?
400, 841, 1202, ?, 1716, 1885
44   45    41   50    ?      59    23
...221, 100, 0, -81, ?
...900 Â Â Â 90Â Â Â 18Â Â Â ? Â Â Â Â 2.16Â Â Â Â 1.08
16, 20, 11, 27, ?, 38
37, 57, 82, ?, 147, 187
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