## Solution
S = (400 + 300)/45 = 700/45 * 18/5 = 56
## What the question and answer could be
A train 400 meters long completely crosses a 300 meters long bridge in 45 seconds. What is the speed of the train is?
Options:
(A) 32
(B) 56
(C) 29
(D) 27
(E) 21
(B)

## Solution
Mentally imagine this number as (10 + 2 ) 19 = 190 + 38 = 228.
## What the question and answer could be
Find 12 19
Options:
(A) 238
(B) 228
(C) 208
(D) 277
(E) 101
(B)

## Solution
If x = 2 then f(x) = 16/15 and f(1/x) = -16/15 which is equal to -f(x)
## What the question and answer could be
If f(x) = x^4/(x^4 - 1), what is f(1/x) in terms of f(x)?
Options:
(A) f(x)
(B) 1/-f(x)
(C) -2/-f(x)
(D) -3/-f(x)
(E) -f(x)
(E)

## Solution
The other parts are equal to a2 + 5ab + 6b2.
## What the question and answer could be
Four of the five parts numbered as (a), (b), (c), (d) and (e)in the following equations are exactly equal. You have to find out the part that is not equal to the other parts. The number of that part is the answer.
Options:
(A) a2 + 5ab + 6b2
(B) (a + 3b) (a + 2b)
(C) a(a + 3b) + 2b(a + 3b)
(D) (3a + b) (a + 2b)
(E) a(a + 2b) + 3b(a + 2b)
(D)