q: A train running at the speed of 60 km/hr crosses a pole in 15 seconds. Find the length of the train.
Options:
(A) 150 m
(B) 145 m
(C) 240 m
(D) 135 m
(E) 250 m
a: Stream of consciousness: Speed = 60*(5/18) m/sec = 50/3 m/sec
Length of Train (Distance) = Speed * Time
(50/3) * 15 = 250 meter The answer is (E).

question: Which of the options is a two-digit number, which has a unit's digit that exceeds its ten's digit by 6 and the product of the given number and the sum of its digits is equal to 136.
Options:
(A) 82
(B) 93
(C) 39
(D) 28
(E) 17
answer: Stream of consciousness: Using the elimination method the option that fits this description is 17
7-1 = 3 (unit's digit that exceeds its ten's digit by 3)
17*8 = 136 (the product of the given number and the sum of its digits is equal to 175) The answer is (E).

q: Find the arithmetic mean A of all roots of the following equation- see an attachment.
Options:
(A) 2
(B) 1
(C) 0.5
(D) -1/3
(E) 0.3
a: Stream of consciousness: Arithmetic mean A your answer C and E are same, can you correct one of them please. thanks. The answer is (C).

question: How much more would Rs.20000 fetch, after two years, if it is put at 20% p.a. compound interest payable half yearly than if is put at 20% p.a. compound interest payable yearly?
Options:
(A) 482
(B) 725
(C) 992
(D) 837
(E) 923
answer: Stream of consciousness: 20000(11/10)4 - 20000(6/5)2 = 482 The answer is (A).

q: In what time will a cart 50 m long cross, if its speed be 36 km/hr?
Options:
(A) 25
(B) 5
(C) 15
(D) 20
(E) 30
a: Stream of consciousness: Speed = 36 * 5/18 = 10 m/sec
Time taken = 50/10 = 5 sec. The answer is (B).

q: Calculate the largest 5 digit number which is exactly divisible by 77?
Options:
(A) 99111
(B) 99946
(C) 99869
(D) 99792
(E) 99654
a:
Stream of consciousness: Largest 4 digit number is 99999
After doing 99999 77 we get remainder 53
Hence largest 5 digit number exactly divisible by 77 = 99999 - 53 = 99946 The answer is (B).