2019 AMC 12A Problem 1
Attempt Problem 1 of the 2019 AMC 12A below, then check your answer against the professionally curated solution from LIVE by Po-Shen Loh. You can also try the full timed exam, view all 2019 AMC 12A solutions, or check the answer key.
All problems are used with official legal permission of the Mathematical Association of America (MAA).
1.
The area of a pizza with radius inches is percent larger than the area of a pizza with radius inches. What is the integer closest to
Answer: E
Solution:
The areas are proportional to the squares of the radii, so the ratio of the larger area to the smaller is
The percent increase is The closest integer is
Thus, the correct answer is E.
Problem 1 in Other Years
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