q: Four of the five parts numbered (a), (b), (c), (d) and (e) in the following equation are exactly equal. Which of the parts is not equal to the other four? The number of that part is the answer.
Options:
(A) 371.587 + 46.32 – 217.907
(B) 4 × 125 – 75 × 4
(C) 58.25 × 4.5 – 65.875
(D) 25 × 12 – 2 × 5 × 10
(E) 121 × 3.5 – 2 × 111.75
a: The other parts are equal to 200. The answer is (C).
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q: A train 520 meters long is running with a speed of 34 kmph. The time taken by it to cross a tunnel 280 meters long is?
Options:
(A) 287 sec
(B) 89 sec
(C) 48 sec
(D) 16 sec
(E) 17 sec
a: D = 580 + 280 = 800
S = 34 * 5/18 = 9 mps
T = 800/9 = 89 sec The answer is (B).
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q: A and B can do a work in 5 days and 10 days respectively. A starts the work and B joins him after 2 days. In how many days can they complete the remaining work?
Options:
(A) 6 days
(B) 2 days
(C) 8 days
(D) 3 days
(E) 9 days
a: Work done by A in 2 days = 2/5
Remaining work = 3/5
Work done by both A and B in one day = 1/5 + 1/10 = 3/10
Remaining work = 3/5 * 10/3 = 2 days. The answer is (B).
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q: The average of first 13 natural numbers is?
Options:
(A) 5.2
(B) 5.5
(C) 7
(D) 9
(E) 10
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
Sum of 13 natural no. = 182/2 = 91
Average = 91/13 = 7 The answer is (C).
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