The average age of A, B and C is 28 years. If the average age of A and C is 29 years, what is the age of B in years ?
Options:
(A) 19
(B) 26
(C) 20
(D) 32
(E) 21
Answer and stream of consciousness: (B)
Stream of consciousness: Age of B = Age of (A + B + C) â€“ Age of (A + C) = 28 Ã— 3 â€“ 29 Ã— 2 = 84 â€“ 58 = 26 years


Henry earns $120 a week from his job. His income increased and now makes $180 a week. What is the percent increase?
Options:
(A) 70%
(B) 60%
(C) 50%
(D) 40%
(E) 30%
Answer and stream of consciousness: (C)
Stream of consciousness: Increase = (60/120)*100 = (1/2)*100 = 50%.


A train 350 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) 25 sec
Answer and stream of consciousness: (D)
Stream of consciousness: Speed = 63 * 5/18 = 35/2 m/sec
Time taken = 350 * 2/35 = 20 sec


What percent is 70 of 280?
Options:
(A) 12 %
(B) 25 %
(C) 26 %
(D) 27 %
(E) 28 %
Answer and stream of consciousness:

Show your work and conclude with the exact phrasing "Therefore, the final answer is [answer]." where [answer] is just the final number or expression that solves the problem.
user
(B)
Stream of consciousness: 70/280 = 1/4
1/4 × 100 = 25 %