Rationale: A's 1 hour work = 1/3;
(B + C)'s 1 hour work = 1/2;
(A + C)'s 1 hour work = 1/2
(A + B + C)'s 1 hour work = (1/3 + 1/2) = 5/6
B's 1 hour work = (5/6 - 1/2) = 1/3
B alone will take 3 hours to do the work.
The answer: (B)
Question: A can do a piece of work in 3 hours; B and C together can do it in 2 hours, which A and C together can do it in 2 hours. How long will B alone take to do it?
Options:
(A) 6hours
(B) 3hours
(C) 2hours
(D) 5hours
(E) 4hours


Rationale: X * (85/100) = 85000
X = 1000 * 100
X = 100000
The answer: (C)
Question: 85% of the population of a city is 85000. The total population of the city is?
Options:
(A) 95000
(B) 97500
(C) 100000
(D) 105000
(E) 102500


Rationale: Numbers are alternatively multiplied by 2 and increased by 3
5 Ã— 2 = 10
10 + 3 = 13
13 Ã— 2 = 26
26 + 3 = 29
29 Ã— 2 = 58
58 + 3 = 61
61 Ã— 2 = 122
The answer: (C)

Show your work and conclude with the exact phrasing "Therefore, the final answer is [answer]." where [answer] is just the final number or expression that solves the problem.
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Question: 5, 10, 13, 26, 29, 58, 61, (....)
Options:
(A) 128
(B) 64
(C) 122
(D) 125
(E) 130