q: If, when the two parties of knights encounter one another after a month, exactly one knight changes from one travelling party to the other travelling party, that knight must be
Options:
(A) P
(B) Q
(C) R
(D) S
(E) T
a: OK... Q because Q always have to travel in northern route
The answer is (B).

q: A man took loan from a bank at the rate of 12% p.a. S.I. After 3 years he had to pay Rs. 5400 interest only for the period. The principal amount borrowed by him was?
Options:
(A) 3887
(B) 2768
(C) 15000
(D) 76887
(E) 16711
a: OK... Principal = (100 * 5400) / (12 * 3) = Rs. 15000
The answer is (C).

q: A racng car travels k kilometres in n hours. How many miles will it travel in x hours at the same rate?
Options:
(A) knx
(B) kn
(C) knx
(D) kx
(E) kxn
a:
OK... Given Speed = k/n
To Find distance in x hours with same speed
Distance = speed * time
Distance = k/n*x = kx/n
The answer is (E).