Q: A train 280 m long, running with a speed of 63 km/hr will pass a tree in?
Options:
(A) 15 sec
(B) 16 sec
(C) 18 sec
(D) 20 sec
(E) 22 sec
A: OK... Stream of consciousness: Speed = 63 * 5/18 = 35/2 m/sec
Time taken = 280 * 2/35 = 16 sec
The answer is (B).

Q: A man invested Rs. 1552 in a stock at 97 to obtain an income of Rs. 128. The dividend from the stock is:
Options:
(A) 8%
(B) 6%
(C) 9%
(D) 10%
(E) 11%
A: OK... Stream of consciousness: Rs 1552 income = Rs 128
By investing Rs 97 income = 128/1552*97 = Rs 8
Divdend = 8%
The answer is (A).

Q: Which of the following is not divisible by 6?
Options:
(A) 10032
(B) 21192
(C) 47816
(D) 91232
(E) 72031
A: OK... Stream of consciousness: Divisibility rule of 6: Number must be divisible by both 2 and 3
Option A: 10032, Divisible by 2. Hence divisible by 6
Option B: 21192, Divisible by 2 & 3. Hence divisible by 6
Option C: 47816, Divisible by 2. Hence divisible by 6
Option D: 91232, Divisible by 2. Hence divisible by 6
Option E: 72031, Not divisible by 2 or 3. Hence 72031 is not divisible by 6
The answer is (E).

Q: 137+276=435 how much is 731+672?
Options:
(A) 534
(B) 1403
(C) 1623
(D) 1513
(E) 1613
A:
OK... Stream of consciousness: 137-731 and 276-672 similarly 435-534
The answer is (A).