Q: Wednesday occurred on 15th September 2010. What was the day of the week on 15th September 2009?
Options:
(A) Monday
(B) Friday
(C) Wednesday
(D) Tuesday
(E) Sunday
A: OK... Stream of consciousness: 1 odd day in the year 2009
So, the day on 15th September 2010 will be one day beyond the day on 15th September 2009
But, 15th September 2010 is Wednesday
On 15th September 2009, it was Tuesday
The answer is (D).

Q: The average of first six prime numbers greater than 65 is?
Options:
(A) 55
(B) 77
(C) 56
(D) 67
(E) 98
A: OK... Stream of consciousness: 67 + 71 + 73 + 79 + 83 + 89 = 462/6 = 77
The answer is (B).

Q: In a boat 25 persons were sitting. Their average weight increased one kilogram when One man goes and a new man comes in. The weight of the new man is 70kgs. Find the Weight of the man who is going ?
Options:
(A) 45
(B) 66
(C) 44
(D) 33
(E) 61
A: OK... Stream of consciousness: Weight increased per person is 1 kg. Total increase in weight = 25 kgs Weight of new man is 70 kgs, (Which means his weight is 25 kgs heavier) The weight of the old man was 70 25 = 45 kgs
The answer is (A).

Q: Which of the following is equal to the average (arithmetic mean) of (x+2)^2 and (x-4)^2?
Options:
(A) x^2
(B) x^2+2
(C) x^2-2x+10
(D) x^2+2x+10
(E) x^2+4x+5
A:
OK... Stream of consciousness: Avg = [(x+2)^2 + (x-4)^2] / 2
Expanding and simplifying, (x^2 + 4x + 4 + x^2 - 8x + 16 ) / 2 = x^2 - 2x +10
The answer is (C).