q: Which of the following is equal to (x-1)!/(x-2)!?
Options:
(A) x-1
(B) 1+(1/x) 
(C) 1
(D) x+1
(E) x-1
a: Stream of consciousness: (x - 1)! = (x - 2)! * (x-1)
(x - 1)!/(x-2)! = x - 1 The answer is (E).


question: The H.C.F of two numbers is 23 and the other two factors of their L.C.M are 13 and 14. The larger of the two numbers is:
Options:
(A) 276
(B) 299
(C) 322
(D) 345
(E) 355
answer: Stream of consciousness: Clearly, the numbers are (23 * 13) and (23 * 14). Larger number = (23 * 14) = 322. The answer is (C).


q: A train 360 meters long is running with a speed of 54 kmph. The time taken by it to cross a tunnel 120 meters long is?
Options:
(A) 29
(B) 18
(C) 48
(D) 99
(E) 32
a: Stream of consciousness: D = 360 + 120 = 480
S = 54 * 5/18 = 15 mps
T = 480/15 = 32 sec The answer is (E).


question: How much more would Rs.60000 fetch, after two years, if it is put at 20% p.a. compound interest payable half yearly than if is put at 20% p.a. compound interest payable yearly?
Options:
(A) 482
(B) 725
(C) 992
(D) 1446
(E) 923
answer: Stream of consciousness: 60000(11/10)4 - 60000(6/5)2 = 1446 The answer is (D).


q: The compound ratio of 2/3, 6/7, 1/3 and 3/8 is given by?
Options:
(A) 7/98
(B) 1/48
(C) 1/98
(D) 1/96
(E) 3/42
a: Stream of consciousness: 2/3 * 6/7 * 1/3 * 3/8 = 36/504 = 3/42 The answer is (E).


q: A man sells two articles for Rs.3600 each and he gains 30% on the first and loses 30% on the next. Find his total gain or loss?
Options:
(A) 9
(B) 8
(C) 7
(D) 5
(E) 3
a:

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.
user
Stream of consciousness: (30*30)/100 = 9%loss The answer is (A).