question: A can do a piece of work in 30 days while B can do it in 40 days. In how many days will they finish it together?
Options:
(A) 120/7
(B) 95/8
(C) 123/9
(D) 150/7
(E) None
answer: Stream of consciousness: 1/30 + 1/40 = 7/120
Both can finish the work in 120/7 days The answer is (A).

q: Express 35 mps in kmph?
Options:
(A) 122
(B) 188
(C) 126
(D) 140
(E) 124
a: Stream of consciousness: 35 * 18/5 = 126 kmph The answer is (C).

question: Find the odd man out
1, 3, 7, 11, 15, 18, 21
Options:
(A) 3
(B) 7
(C) 18
(D) 21
(E) 1
answer: Stream of consciousness: The 18 is the only even number in the series. The answer is (C).

q: The speed of a boat in still water is 60kmph and the speed of the current is 20kmph. Find the speed downstream and upstream?
Options:
(A) 30/90 kmph
(B) 80,40 kmph
(C) 24,98 kmph
(D) 30,54 kmph
(E) 45.98 kmph
a: Stream of consciousness: Speed downstream = 60 + 20 = 80 kmph
Speed upstream = 60 - 20 = 40 kmph The answer is (B).

question: A train running at the speed of 60 km/hr crosses a pole in 9 seconds. Find the length of the train.
Options:
(A) 150 m
(B) 145 m
(C) 140 m
(D) 135 m
(E) 155 m
answer: Stream of consciousness: Speed = 60*(5/18) m/sec = 50/3 m/sec
Length of Train (Distance) = Speed * Time
(50/3) * 9 = 150 meter The answer is (A).

question: The average of 13 result is 20. Average of the first 8 of them is 20 and that of the last 8 is 40. Find the 8th result?
Options:
(A) 35
(B) 37
(C) 46
(D) 90
(E) 100
answer:
Stream of consciousness: Sum of all the 13 results = 13 * 20 = 260
Sum of the first 7 of them = 8 * 20 = 160
Sum of the last 7 of them = 8 * 40 = 320
So, the 8th number = 260 + 160 - 320 = 100. The answer is (E).