Q: How much is 80% of 40 is greater than 4/5 of 30?
Options:
(A) 12
(B) 27
(C) 8
(D) 12
(E) 81
A: OK... Stream of consciousness: (80/100) * 40 (4/5) * 30
32 - 24 = 8
The answer is (C).

Q: How much 80% of 40 is greater than 10% of 15?
Options:
(A) 18
(B) 99
(C) 19
(D) 18
(E) 17
A: OK... Stream of consciousness: (80/100) * 40 (10/100) * 15
32 - 15 = 17
The answer is (E).

Q: A technician makes a round-trip to and from a certain service center by the same route. If the technician completes the drive to the center and then completes 10 percent of the drive from the center, what percent of the round-trip has the technician completed?
Options:
(A) 5%
(B) 10%
(C) 25%
(D) 40%
(E) 55%
A: OK... Stream of consciousness: Assuming that the technician makes a round-trip of 40 miles (each way is 20 miles), then the technician would have completed 20 miles + 2 miles (10% of the remaining 20 miles). Therefore, the total is 22 miles. 22miles/40 miles is 55% of the entire trip.
The answer is (E).

Q: Find the value of y from (12)^3 x 6^4 432 = y?
Options:
(A) 3456
(B) 4567
(C) 4789
(D) 5678
(E) y=5184
A:
OK... Stream of consciousness: Given Exp. = (12)3 x 64 = (12) 3 x 64 = (12)2 x 62 = (72)2 = 5184
432 12 x 62
The answer is (E).