question: Look at this series: 664, 332, 340, 170, ____, 89, ... What number should fill the blank?
Options:
(A) 85
(B) 97
(C) 109
(D) 178
(E) 112
answer: Stream of consciousness: Answer: Option D
This is an alternating division and addition series: First, divide by 2, and then add 8. The answer is (D).

q: A rectangular garden is 12m by 5m, what is its area?
Options:
(A) 12 square meters
(B) 5 square meters
(C) 44 square meters
(D) 60 square meters
(E) 22 square meters
a: Stream of consciousness: Area of a Rectangle: A = w h
D) 60 square meters The answer is (D).

question: Which one of the following is not a prime number?
Options:
(A) 31
(B) 61
(C) 71
(D) 91
(E) 101
answer: Stream of consciousness: 91 is divisible by 7. So, it is not a prime number. The answer is (D).

q: An entrepreneurship competition requires registering teams to have 3 team members, at least one of which must be a technology co-founder. If all team members must come from the auditorium during the meet and greet event which has 4 technologists and 6 businessmen, how many possible team submissions are possible?
Options:
(A) 76
(B) 100
(C) 162
(D) 198
(E) 202
a: Stream of consciousness: We have 3 scenarios here:
1) 1 tech2 businessmen: 4C1 x 6C2 = 60
2) 2 tech1 businessman: 4C2 x 6C1 = 36
3) 3 tech0 businessmen: 4C3 = 4
Total: 60+36+4 = 100 The answer is (B).

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

question: A man rows his boat 75 km downstream and 45 km upstream, taking 2 1/2 hours each time. Find the speed of the stream?
Options:
(A) 5 kmph
(B) 6 kmph
(C) 9 kmph
(D) 8 kmph
(E) 1 kmph
answer:
Stream of consciousness: Speed downstream = d/t = 75/(2 1/2) = 30 kmph
Speed upstream = d/t = 45/(2 1/2) = 18 kmph
The speed of the stream = (30 - 18)/2 = 6 kmph The answer is (B).