question: The average of 10 numbers is calculated as 5. It is discovered later on that while calculating the average, one number namely 36 was wrongly read as 26. The correct average is?
Options:
(A) 2
(B) 3
(C) 4
(D) 5
(E) 6
answer: Stream of consciousness: 10 * 5 + 36 26 = 60/10 = 6 The answer is (E).

q: A man rows his boat 75 km downstream and 45 km upstream, taking 5 hours each time. Find the speed of the stream?
Options:
(A) 6 kmph
(B) 5 kmph
(C) 2 kmph
(D) 3 kmph
(E) 1 kmph
a: Stream of consciousness: Speed downstream = d/t = 75/(5) = 15 kmph
Speed upstream = d/t = 45/(5) = 9 kmph
The speed of the stream = (15 - 9)/2 = 3 kmph The answer is (D).

question: Dick and Jane each saved $3,000 in 1989. In 1990 Dick saved 8 percent more than in 1989, and together he and Jane saved a total of $5,000. Approximately what percent less did Jane save in 1990 than in 1989?
Options:
(A) 8%
(B) 25%
(C) 41%
(D) 59%
(E) 70%
answer: Stream of consciousness: Dick saved = $ 3240
Jane saved = $ 1760 (jane saved $1240 less than she did the prior year)
Jane saved approximately $1240/$3000 (close to 41%) less in 1990 The answer is (C).

q: A team of eight entered for a shooting competition. The best marks man scored 82 points. If he had scored 92 points, the average scores for. The team would have been 82. How many points altogether did the team score?
Options:
(A) 662
(B) 672
(C) 652
(D) 646
(E) 721
a: Stream of consciousness: 8 * 82 = 656 10 = 646 The answer is (D).

question: A women purchased 3 towels @ Rs.100 each, 5 towels @ Rs.150 each and two towels at a certain rate which is now slipped off from his memory. But she remembers that the average price of the towels was Rs.160. Find the unknown rate of two towels?
Options:
(A) A) 400
(B) B) 450
(C) C) 500
(D) D) 550
(E) E) 600
answer: Stream of consciousness: 10 * 160 = 1600
3 * 100 + 5 * 150 = 1050
1600 1050 = 550 The answer is (D).

question: K-numbers are positive integers with only 2's as their digits. For example, 2, 22, and 222 are K-numbers. The K-weight of a number n is the minimum number of K-numbers that must be added together to equal n. For example, the K-weight of 50 is 5, because 50 = 22 + 22 + 2 + 2 + 2. What is the K-weight of 650?
Options:
(A) 10
(B) 11
(C) 12
(D) 13
(E) 14
answer:
Stream of consciousness: 650 = 2*222 + (22*9) + 4*2
K weight of 600 = 2 +9+2 = 13 The answer is (D).