q: What should come in place of the question mark (?) in the following equation?
5978 + 6134 + 7014 = ?
Options:
(A) 19226
(B) 16226
(C) 19216
(D) 19126
(E) None of these
a: Stream of consciousness: ? = 5978 + 6134 + 7014 = 19126 The answer is (D).

question: John makes $40 a week from his job. He earns a raise and now makes $70 a week. What is the % increase?
Options:
(A) 16%
(B) 16.66%
(C) 17.9%
(D) 18.12%
(E) 75%
answer: Stream of consciousness: Increase = (30/40)*100 = (3/4)*100 = 75%. The answer is (E).

q: A pipe can fill a cistern in 18 minutes whereas the cistern when fill can be emptied by a leak in 36 minutes. When both pipes are opened, find when the cistern will be full?
Options:
(A) 17
(B) 36
(C) 70
(D) 13
(E) 12
a: Stream of consciousness: 1/18 - 1/36 = 1/36
36 minutes The answer is (B).

question: A owes B Rs.50. He agrees to pay B over a number of consecutive days on a Monday, paying single note or Rs.10 or Rs.20 on each day. In how many different ways can A repay B.
Options:
(A) 2
(B) 8
(C) 9
(D) 6
(E) 5
answer: Stream of consciousness: He can pay by all 10 rupee notes = 1 way
3 Ten rupee + 1 twenty rupee = 4!3!1!4!3!1! = 4 ways
1 Ten rupee + 2 twenty rupee notes = 3!2!1!3!2!1! = 3 ways
Total ways = 1 + 4 + 3 = 8 The answer is (B).

q: What approximate value should come in place of the question mark (?) in the following equation'?
3 35 of 157.85 + 39% of 1847 = ? 447.30
Options:
(A) 1200
(B) 1500
(C) 1600
(D) 1800
(E) 2100
a: Stream of consciousness: ? 185 160 + 401000 1850 + 450
576 + 740 + 450 1760 1800 The answer is (D).

q: If x is an odd integer, which of the following is an even integer?
Options:
(A) 2x-x
(B) x+1
(C) 2x+3
(D) x^3
(E) 3x+2x
a:
Stream of consciousness: Plug in an odd integer; in this case 3
(2*3)-3 = 3 Odd
3+1 = 4 Even
(2*3)+3 = 9 Odd
3^3 = 27 Odd
(3*3)+(2*3) = 9 + 6 = 15 Odd The answer is (B).