[Ans] (B)
[Question] 396, 462, 572, 427, 671, 264
Options:
(A) 396
(B) 427
(C) 671
(D) 264
(E) 572
[CoT] In each number except 427, the middle digit is the sum of other two.

[Ans] (B)
[Question] Three 6 faced dice are thrown together. The probability that exactly two dice show the same number on them is
Options:
(A) 5/18
(B) 5/12
(C) 5/19
(D) 5/15
(E) 5/11
[CoT] Using question number 11 and 12, we get the probability as
1 - (1/36 + 5/9) = 5/12

[Ans] (C)
[Question]
Two pipes can fill a tank in 20 and 24 minutes respectively and a waste pipe can empty 3 gallons per minute. All the three pipes working together can fill the tank in 15 minutes. The capacity of the tank is?
Options:
(A) 820 gallons
(B) 128 gallons
(C) 120 gallons
(D) 129 gallons
(E) 220 gallons
[CoT] Work done by the waste pipe in 1 minute = 1/15 - (1/20 + 1/24) = - 1/40
Volume of 1/40 part = 3 gallonsVolume of whole = 3 * 40 = 120 gallons.