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We can say that Let the efficiency of each boy and each girl be 'B' units/day and 'G' units/day, respectively. So, efficiency of a child = (G/0.50) = '2G' units per day According to the question, (18B + 12G) × 12 = (74B + 30G) × 3 Or, 216B + 144G = 222B + 90G Or, 6B = 54G Or, B = 9G Therefore, Total work = (18B + 12G) × 12 = (9 × 18G + 12G) × 12 = '2088G' units Combined efficiency of 8 boy, 5 Girl and 5 children = (8 × 9G) + 5G + (5 × 2G) = 72G + 5G + 10G = '87G' units per day Required time taken = (2088G/87G) = 24 days.
12, 12, 30, 120, ?, 4620
155, 161, 173, 191, ?, 245
37, 57, 82, ?, 147, 187
196, 196, 203, 229, 292, ?
178 168 148 ? 78 28
What will be come in place of (?) in the given number series.
2, 3, 5, 7, 11, ?, 17
1, 7, 37, 187, 937, ?
What will come in place of the question mark (?) in the following series?
4, 11, 32, 95, 284, 851, ?
21, 28, 39, 52, ?, 88