question: A man started running at a distance of 225 metre from the train. If the speed of the man is 6 km/h, then how much time should the train wait so that the man will be just able to catch it ?
Options:
(A) 2 14 min
(B) 3 min
(C) 4 14 min
(D) 4 12 min
(E) None of these
answer: Stream of consciousness: Time = 225/6518 = 135 sec = 214 min. The answer is (A).

q: How many seconds will a train 100 meters long take to cross a bridge 150 meters long if the speed of the train is 36 kmph?
Options:
(A) 22 sec
(B) 77 sec
(C) 25 sec
(D) 18 sec
(E) 17 sec
a: Stream of consciousness: D = 100 + 150 = 250
S = 36 * 5/18 = 10 mps
T = 250/10 = 25 se The answer is (C).

question: Which of the following is equal to the average (arithmetic mean) of (x+3)^2 and (x-3)^2?
Options:
(A) x^2
(B) x^2+2
(C) x^2 +4
(D) x^2+9
(E) x^2+4x
answer: Stream of consciousness: Avg = [(x+3)^2 + (x-3)^2] / 2
Expanding and simplifying, (x^2 + 6x + 9 + x^2 - 6x + 9 ) / 2 = x^2 + 9 The answer is (D).

q: 4000 was divided into two parts such a way that when first part was invested at 3% and the second at 5%, the whole annual interest from both the investments is Rs.144, how much was put at 3%?
Options:
(A) 2808
(B) 2829
(C) 2800
(D) 2829
(E) 2821
a: Stream of consciousness: (x*3*1)/100 + [(4000 - x)*5*1]/100 = 144
3x/100 + 200 5x/100 = 144
2x/100 = 56 e x = 2800 The answer is (C).

question: The number N is 6,2X4, where X represents the ten's digit. If N is divisible by 9, what is the value of X?
Options:
(A) 1
(B) 3
(C) 5
(D) 7
(E) 6
answer: Stream of consciousness: Integer is divisible by 9 - Sum of digits is divisible by 9 The answer is (E).

question: What approximate value should come in place of question mark (?) in the following equation
287.532 + 1894.029 657.48 = 843.095 + ?
Options:
(A) 870
(B) 790
(C) 680
(D) 770
(E) 890
answer:
Stream of consciousness: ? = 285 + 1895 655 845 or, ? = 680 The answer is (C).