question: X can finish a work in 18 days. Y can finish the same work in 15 days. Yworked for 10 days and left the job. how many days does X alone need to finish the remaining work?
Options:
(A) 2
(B) 3
(C) 6
(D) 7
(E) 8
answer: Stream of consciousness: Work done by X in 1 day = 1/18
Work done by Y in 1 day = 1/15
Work done by Y in 10 days = 10/15 = 2/3
Remaining work = 1 2/3 = 1/3
Number of days in which X can finish the remaining work = (1/3) / (1/18) = 6 The answer is (C).

q: An businessman earns an income of Re 2 on the first day of his business. On every subsequent day, he earns an income which is just double of that made on the previous day. On the 20th day of business, he earns an income of:
Options:
(A) 21
(B) 22
(C) 36
(D) 20
(E) 30
a: Stream of consciousness: 2nd day he earns = 2(2 2)
3rd day he earns = 2(3 2)
On 20th day he earns 2(20 -2) = 36 rupees The answer is (C).

question: How much is 80% of 40 is greater than 4/5 of 25?
Options:
(A) 229
(B) 87
(C) 26
(D) 12
(E) 667
answer: Stream of consciousness: (80/100) * 40 (4/5) * 25
32 - 20 = 12 The answer is (D).

q: A 180 meter long train crosses a man standing on the platform in 6 sec. What is the speed of the train?
Options:
(A) 48 kmph
(B) 52 kmph
(C) 108 kmph
(D) 100 kmph
(E) 98 kmph
a: Stream of consciousness: S = 180/6 * 18/5 = 108 kmph The answer is (C).

question: The average of 11 results is 46, if the average of first six results is 49 and that of the last six is 52. Find the sixth result?
Options:
(A) 21
(B) 56
(C) 100
(D) 25
(E) 23
answer: Stream of consciousness: 1 to 11 = 11 * 46 = 506
1 to 6 = 6 * 49 = 294
6 to 11 = 6 * 52 = 312
6th = 294 + 312 506 = 100 The answer is (C).

question: In case M is the only individual sewing on committee B, which among the following shouldserve on committee A?
Options:
(A) V and U
(B) V and T
(C) U and S
(D) N and O
(E) T and U
answer:
Stream of consciousness: N and O should serve on A The answer is (D).