Question
X can finish a task in 20 days, while Y can do it in 25
days. If Z needs 1.2 times the time taken by X and Y together, find the number of days Z will take to complete the same task.Solution
ATQ,
Time taken by X and Y together to complete the work = (20 × 25)/ (20 + 25) = 11.11 days
Time taken by Z alone to complete the work = 1.2 × 11.11 = 13.33 days
What should come in place of (?) question mark in the given number series.
81, 73, 66, 60, 55, ?
14 6 4 4 ? 48
...What should come in place of (?) question mark in the following number series.
5, 11, 23, 47, 95, ?
In each of the following number series, one term is missing. Find the missing term.
1, 4, 9, 16, 25, ?
What will come in place of the question mark (?) in the following series?
4, 11, 32, 95, 284, 851, ?
156, 182, 210, 240, 272, ?
31    32      35      ?      47       56
...What should come in place of (?) question mark in the following number series.
1, 2, 6, 24, 120, ?
What value should come in the place of (?) in the following number series?
71, 72, 76, 103, ?, 244254, ?, 1022, 1150, 1214, 1246
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