Question
E and F can complete a task in 24 days together. E alone
can do it in 40 days. Find the time F alone would take.Solution
Let the total work be 120 units. {LCM (24 and 40)}
So, combined efficiency of 'E' and 'F' = 120 ÷ 24 = 5 units/day
Efficiency of 'E' = 120 ÷ 40 = 3 units/day
So, efficiency of 'F' = 5 - 3 = 2 units/day
So, time taken by 'F' to do the work alone = 120 ÷ 2 = 60 days
17, 19, 41, 127, 513, ?Â
Find the missing term in the series:
3, 8, 19, 42, 89, ?
161Â Â Â Â 173Â Â Â Â Â Â 191 Â Â Â Â Â Â 215Â Â Â Â Â Â 245 Â Â Â Â Â Â ?
...What will come in place of the question mark (?) in the following series?
4.5, 8, 15, 29, ?, 113
What will come in place of the question mark (?) in the following series?
7, 19, 55, 163, 487, ?
6, 7, 15, 46, 185, ?
What will come in place of the question mark (?) in the following number series?
17, 28, 48, ?, 123, 182
4097, ?, 4359, 4493, 4629, 4767
12   18   31   51   ?   112
17   9   10   16.5   35    ?    273
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