Question
138 unit of work can be completed by P alone in 23 days.
P started working alone and joined by Q after 11 days such that they completed the remaining work in 8 days. Find the number of days taken by Q to complete the whole work alone.Solution
Let the efficiency of Q = x units/day Efficiency of P = (138/23) = 6 units/day According to question: 6 × 11 + (6 + x) × 8 = 138 Or, 66 + 48 + 8x = 138 Or, 8x = 138 – 114 Or, 8x = 24 Or, x = 3 Number of days taken by Q to complete the work alone = (138/3) = 46 days
Select the number from among the given option that can replace the question mark (?) in the following series.
11, 18, 30, 52, 94, ?
Select the number from among the given option that can replace the question mark (?) in the following series.
6, 31, 126, 381, 766, ?
M/14 : O/12 : : U/6 : ?
Select the related word/letters/number from the given alternatives.
LHX: OEA : : PFT : ?
Find the missing term in the following series:
43 44 ? 69 185
...Find the missing numbers.
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What will come in the place of question mark?
In each of the following questions, select the related number from the given alternatives:
8/15 : 2/5 : : 16/21 : ?
Find the missing term in the given series:
4      3.5      ?           22.875               ...
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