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Let the total work be 'w' units and efficiency of each man be 'e' units/day Let number of men required to finish the work in 8 days be 'm'. ATQ; W/(40 x 15 x e) = W/(8 x e x m) m = 75 So, 75 - 40 = 35 more men should be hired.
25 13.5 12.5 20.75 39.5 ? 302.25
...362 284 393 451 144 221
...100, 110, ?, 171.6, 240.24, 360.36
31 48 67 90 ? 150
8 24 12 ? 18 54
D irection: Which of the following will replace ‘?’ in the following series.
543,’?’, 564 ,588, 660
...112 ? 336 840 2520 8820
...3601 3602 1803 604 154 36
...18, 32, 50, 82, 132, ?
9, 21, 67, 273, 1371, ?
