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Ratio of efficiency of Pankaj & Suraj = 3:1 & they do a job in 36 days so let total work = (3+1)`xx` 36 = 144 units Hence Suraj alone will finish this job in = 144/1 = 144 days
1 6 13 24 41 ?
35 36 68 207 836 4205
...Select the number from among the given options that can replace the question mark (?) in the following series.
2, 6, 12, 20, ?, ?
56, 57, 49, 76, 12, ?
8 9 22 75 316 ?
...1331 1000 729 512 ? 216
...8 9 22 75 316 ?
...19, 37, 65, 91, 127, 169
9, 21, 67, 273, 1371, ?
40 30 20 ? 7.5 4.375
