Question: 7528:5306::4673:?
Options:
(A) 2351
(B) 2451
(C) 2551
(D) 2651
(E) 2751
Answer: As there is a difference of 2222. 7528-2222 = 5306. so 4673-2222 = 2451
The answer is (B).

Question: A train running at the speed of 60 km/hr crosses a pole in 18 sec. What is the length of the train?
Options:
(A) 356
(B) 278
(C) 300
(D) 279
(E) 150
Answer: Speed = 60 * 5/18 = 50/3 m/sec
Length of the train = speed * time = 50/3 * 18 = 300 m
The answer is (C).

Question: A can do a piece of work in 10 days. He works at it for 4 days and then B finishes it in 9 days. In how many days can A and B together finish the work?
Options:
(A) 6
(B) 8
(C) 12
(D) 15
(E) 20
Answer: 4/10+9/X = 1/x = 15
1/10+1/15 = 1/6 = 6 days
The answer is (A).

Question: The edge of a cube is 2a cm. Find its surface?
Options:
(A) 24a8
(B) 24a4
(C) 24a1
(D) 24a2
(E) 24a7
Answer:
6a2 = 6 * 2a * 2a = 24a2
The answer is (D).