q: If the average (arithmetic mean) of the four numbers K, 2K + 3, 3K 5 and 5K + 1 is 41, what is the value of K?
Options:
(A) 41
(B) 15 3/4
(C) 22
(D) 23
(E) 25 3/10
a: Stream of consciousness: K + 2K +3 + 3K - 5 + 5K +1 = 11K -1
(11K -1)/4 = 41
11K = 41 * 4 +1 = 164 +1 = 165
K = 165 / 11 = 15. The answer is (A).

question: Dawson earns $100 a week from his job. His income increased and now makes $110 a week. What is the percent increase?
Options:
(A) 5%
(B) 10%
(C) 15%
(D) 20%
(E) 25%
answer: Stream of consciousness: Increase = (10/100)*100 = (1/10)*100 = 10%. The answer is (B).

q: A corporation triples its annual bonus to 50 of its employees. What percent W of the employees' new bonus is the increase?
Options:
(A) 50%
(B) 6623%
(C) 100%
(D) 200%
(E) 300%
a: Stream of consciousness: W of the employees' new bonus is the increase Hence The answer is (B).

question: If the average (arithmetic mean) of the four numbers K, 2K + 3, 3K 5 and 5K + 1 is 118, what is the value of K?
Options:
(A) 11
(B) 15 3/4
(C) 22
(D) 118
(E) 25 3/10
answer: Stream of consciousness: K + 2K +3 + 3K - 5 + 5K +1 = 11K -1
(11K -1)/4 = 118
11K = 118 * 4 +1 = 472 +1 = 473
K = 473 / 11 = 43. The answer is (D).

q: A man purchased 3 blankets @ Rs.100 each, 5 blankets @ Rs.150 each and two blankets at a certain rate which is now slipped off from his memory. But he remembers that the average price of the blankets was Rs.154. Find the unknown rate of two blankets?
Options:
(A) 420
(B) 550
(C) 490
(D) 450
(E) 457
a: Stream of consciousness: 10 * 154 = 1540
3 * 100 + 5 * 150 = 1050
1540 1050 = 490 The answer is (C).

q: The average of first 10 even numbers is?
Options:
(A) 17
(B) 199
(C) 16
(D) 11
(E) 123
a:
Stream of consciousness: Sum of 10 even numbers = 10 * 11 = 110
Average = 110/10 = 11 The answer is (D).