question: Two persons A and B can complete a piece of work in 30 days and 45 days respectively. If they work together, what part of the work will be completed in 6 days?
Options:
(A) 2/5
(B) 1/6
(C) 1/3
(D) 1/9
(E) 2/6
answer: Stream of consciousness: A's one day's work = 1/30
B's one day's work = 1/45
(A + B)'s one day's work = 1/30 + 1/45 = 1/18
The part of the work completed in 6 days = 6 (1/18) = 1/3. The answer is (C).

q: If the ratio of ages of two friends is 4:3 and sum of their ages is 70 years then what is the age of older friend?
Options:
(A) 30 years
(B) 35 years
(C) 40 years
(D) 25 years
(E) 45 years
a: Stream of consciousness: Sum of thier ages is 70 in ratio 4:3
So 40+30 gives us 70. Wich is 4:3 so, older guy is having 40. The answer is (C).

question: A train 100 meters long completely crosses a 300 meters long bridge in 45 seconds. What is the speed of the train is?
Options:
(A) 32
(B) 28
(C) 299
(D) 277
(E) 21
answer: Stream of consciousness: S = (100 + 300)/45 = 400/45 * 18/5 = 32 The answer is (A).

q: A train 280 m long, running with a speed of 63 km/hr will pass a tree in?
Options:
(A) 18 sec
(B) 16 sec
(C) 76 sec
(D) 15 sec
(E) 17 sec
a: Stream of consciousness: Speed = 63 * 5/18 = 35/2 m/sec
Time taken = 280 * 2/35 = 16 sec The answer is (B).

question: What should come in place of the question mark (?) in the following equation?
12400 + 6899 = 610+ ?
Options:
(A) 12345
(B) 56894
(C) 18689
(D) 23478
(E) 94561
answer: Stream of consciousness: 12400 + 6899 = 610+ ?
12400 + 6899 610 = 18689 The answer is (C).

question: Find the value of y from (12)^3 x 6^4432 =y?
Options:
(A) 4363
(B) 4765
(C) 4879
(D) 6789
(E) 5184
answer:
Stream of consciousness: Given Exp. = (12)3 x 64 = (12)3 x 64 = (12)2 x 62 = (72)2 = 5184
432 12 x 62 The answer is (E).