Question
A and B together, B and C together and A and C together
can complete a piece of work in 12 days, 11 days and 12 days respectively. Find the ratio of the efficiencies of A, B and C, respectively.Solution
Let, the total work be 132 units (LCM of 12, 11 and 12) Amount of work done by A and B together in one day = 132/12 = 11 units Amount of work done by B and C together in one day = 132/11 = 12 units Amount of work done by A and C together in one day = 132/12 = 11 units Amount of work done by A, B and C together in one day = (11 + 12 + 11)/2 = 17 units Amount of work done by A alone in one day = 17 – 12 = 5 units Amount of work done by B alone in one day = 17 – 11 = 6 units Amount of work done by C alone in one day = 17 – 11 = 6 units So the desired ratio = 5:6:6
What will come in place of the question mark (?) in the following series?
1528, 1416, 1204, ?, 480, -32
143 Â Â Â Â 119Â Â Â Â 107Â Â Â Â 101Â Â Â Â Â 98Â Â Â Â ?
96 89 ? 90 94 91
...What value should come in the place of (?) in the following number series?
19, 235, 260, 324, 333, ?
What will come in place of the question mark (?) in the following series?
305...
In each of the following number series, one term is missing. Find the missing term.
3, 5, 20, 24, 144, 150, ?
1029, 1030, 1039, 1064, ?, 1194
75, 80, 95, ?, 155, 200
What will come in place of the question mark (?) in the following series?
1515, 184, ?, 455, 967, 624
7 29 61 ? 211 349
...
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