Question
Leela and Laila, working together, can complete a task
in 18 days. Given that Laila is 125% more efficient than Leela, how long would it take for Laila to finish the task by herself?Solution
Let the efficiency of Leela alone = 4 units/day Then, efficiency of Laila alone = 4 + 4 X 1.25 = 9 units/day So, total work = (4 + 9) X 18 = 234 units And so, time taken by Laila alone to complete the work = 234 ÷ 9 = 26 days Hence, option a.
Find the wrong number, in the given number series,
4, 10, 20, 40, 100, 250, 500
9 20 63 255 1285 7716
...Find the wrong number in the given number series.
2, 3, 5, 8, 13, 22, 34In each of the following giving number series, a wrong number is given. Find out the wrong number?
3023, 3132, 3246, 3356, 3471
547, 594, 640, 691, 741, 792
5, 13, 41, 185, 1111, 8149
2, 4, 16, 48, 240, 1440, 10080
Find the wrong number in the given number series.
3, 6, 24, 120, 720, 5040
12, 3.6, 18, 0.72, 0.432, 0.3024
24, 12, 22.5, 45, 157.5, 708.75
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