Question
‘n’ men working 12 hours a day can complete a work
in 15 days while (3n – 8) men working 12 hours a day can complete the same work in 9 days. In how many days can (n + 2) men working 5 hours a day complete the same work?Solution
According to the question, (n × 12 × 15) = {(3n – 8) × 12 × 9} => 5n = 9n – 24 => n = 6 Let the number of days taken by (n + 2) = 8 men be ‘x’ days Therefore, (6 × 12 × 15) = (8 × 5 × x) Therefore, x = 27 days
What value should come in the place of (?) in the following number series?
500, 789, 428, ?, 340, 965
Choose the missing term.
R, U, X, A, D,?
204, ?, 120, 83, 52, 23
6, 7, 16, 51, 208, ?
226, 171, 124, 85, 54, ?
4, 5, 11, 34, 137, ?
What will come in place of the question mark (?) in the following series?
4, 11, 32, 95, 284, 851, ?
8, ?, 29, 57, 113, 225
In each of the following series, one term is missing. Find the missing term.
7, 11, 19, 35, 67, ?
What should come in place of (?) question mark in the following number series.
5, 11, 23, 47, 95, ?
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