question: Find the mean proportional between 49 & 64?
Options:
(A) A) 59
(B) B) 61
(C) C) 56
(D) D) 65
(E) E) 67
answer: Stream of consciousness: Formula = ab
A = 49 and B = 64
4964 = 7 8 = 56 The answer is (C).

q: Steve traveled the first 2 hours of his journey at 40 mph and the last 2 hours of his journey at 80 mph. What is his average speed of travel for the entire journey?
Options:
(A) 53.33 mph
(B) 56.67 mph
(C) 60 mph
(D) 64 mph
(E) 66.67 mph
a: Stream of consciousness: Average Speed = Total distance/ Total time = (40 * 2 + 80 * 2)/(2 + 2) = 240/4 = 60 The answer is (C).

question: Express 30 mps in kmph?
Options:
(A) 122
(B) 108
(C) 110
(D) 150
(E) 100
answer: Stream of consciousness: 30 * 18/5 = 108 kmph The answer is (B).

q: If 17m n = p, then which of the following represents the average (arithmetic mean) of m, n, and p, in terms of m?
Options:
(A) 2m 1
(B) 4m
(C) 6m
(D) m/5
(E) 6m/5
a: Stream of consciousness: 17m - n = p
Add n to both sides:
17m = n + p
Add m to both sides:
18m = n + p + m
Now, divide both sides by 3
6m = (n + p + m)/3 = the average of n, p, and m The answer is (C).

question: Working alone, Printers X, Y, and Z can do a certain printing job, consisting of a large number of pages, in 12, 25, and 30 hours, respectively. What is the ratio of the time it takes Printer X to do the job, working alone at its rate, to the time it takes Printers Y and Z to do the job, working together at their individual rates?
Options:
(A) 4/11
(B) 1/2
(C) 15/22
(D) 150/11
(E) 11/4
answer: Stream of consciousness: P1 takes 12 hrs
Rate for P2P3 together = 1/25 + 1/30 = 11/150
Therefore they take 150/11
Ratio = 150/11 = The answer is (D).

question: How much more would Rs.20000 fetch, after two years, if it is put at 20% p.a. compound interest payable half yearly than if is put at 20% p.a. compound interest payable yearly?
Options:
(A) 482
(B) 725
(C) 992
(D) 837
(E) 923
answer:
Stream of consciousness: 20000(11/10)4 - 20000(6/5)2 = 482 The answer is (A).