Quant 2nd Edition – PS Questions 21-30

Question 21 – “In the rectangular coordinate system above….”

OG Explanation is fine.

Question 22 – “A certain population of…..”

OG Explanation is fine.

Question 23 – “How many….”

OG Explanation is fine.   Alternatively, if a car travels at 400 miles per hour, it travels 100 miles per every 15 minutes.   Thus, to travel 120 miles, it would take more than 15 minutes.   Only answer choice E works here.

Question 24 – “If the perimeter…”

OG Explanation is fine.  Alternatively, you could just go directly to the answer choices.    There is no need to do quadratics.   Let x be the longer side and y with shorter.   60=xy.   If we start with choice C, x=10,   y=6; perimeter = 10+10+6+6=32.   Then try D as we need more perimeter for the same area, x=12, y=5; perimeter =12+12+5+5=34

Question 25 – “A certain manufacturer…”

OG Explanation is fine.

Question 26 = “In a poll of 66,000….”

OG Explanation is fine.

Question 27 – “3/100 +….”

OG Explanation is fine.

Question 28 – “If the number n…”

OG Explanation is fine.   Remember, Revenue = Price x Quantity

Question 29 – “Which of the ….”

OG Explanation is fine.  Alternatively, you might recnize .0625 is one half of 1/8.   One-half of 1/8 is 1/16.

Question 30 – “In the figure above…”

OG Explanation is fine. 