List K consists of 10 consecutive integers. If -4 is the least integer in list K, what is the range of the positive integers in list K?
Options:
(A) 5
(B) 6
(C) 7
(D) 11
(E) 4
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Answer = E = 4
If least = -4, then largest = 5
Range = 5 - 1 = 4 So the answer is: (E).
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Two pipes A and B can fill a cistern in 15 and 30 minutes respectively, and a third pipe C can empty it in 40 minutes. How long will it take to fill the cistern if all the three are opened at the same time?
Options:
(A) 17 1/4 min
(B) 28 1/7 min
(C) 17 1/7 min
(D) 13 3/7 min
(E) 17 5/7 min
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1/15 + 1/30 - 1/40 = 9/120
120/9 = 13 3/7 So the answer is: (D).
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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
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The other parts are equal to 200. So the answer is: (C).
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