Two trains are moving at 80 kmph and 70 kmph in opposite directions. Their lengths are 150 m and 100 m respectively. The time they will take to pass each other completely is?
Options:
(A) 4 sec
(B) 5 sec
(C) 6 sec
(D) 7 sec
(E) 8 sec
Answer and stream of consciousness: (C)
Stream of consciousness: 70 + 80 = 150 * 5/18 = 125/3 mps
D = 150 + 100 = 250 m
T = 250 * 3/125 = 6 se

What is the sum of all the prime numbers greater than 10 but less than 40?
Options:
(A) 190
(B) 189
(C) 180
(D) 199
(E) 1981
Answer and stream of consciousness: (C)
Stream of consciousness: Required sum = (11 +13 + 17 + 19 + 23+ 29 + 31 + 37) = 180
Note: 1 is not a prime number

In case T, S and X are the only individuals sewing on committee B, the members of committee C should be:
Options:
(A) Z and Y
(B) Z and W
(C) Y and V
(D) Y and U
(E) Y and W
Answer and stream of consciousness: (D)
Stream of consciousness: Y and U Because in committee b the individuals are S and X so in committee c the individuals will be Y and U

A sells a Cricket Bat to B at a profit of 20%. B sells it to C at a profit of 25%. If C pays $222 for it, the cost price of the Cricket Bat for A is:
Options:
(A) 150
(B) 148
(C) 130
(D) 160
(E) 210
Answer and stream of consciousness:
(B)
Stream of consciousness: 125% of 120% of A = 222
125/100 * 120/100 * A = 222
A = 222 * 2/3 = 148.