1986 AMC 8 Problem 11
Attempt Problem 11 of the 1986 AMC 8 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 1986 AMC 8 solutions, or check the answer key.
All problems are used with official legal permission of the Mathematical Association of America (MAA).
11.
If means then is
Answer: A
Small hint:
The operation gives the average of and
Big hint:
First compute then combine that result with
Solution:
First, Then
Thus, the correct answer is A .
Problem 11 in other years
- 1985 AMC 8
- 1987 AMC 8
- 1988 AMC 8
- 1989 AMC 8
- 1990 AMC 8
- 1991 AMC 8
- 1992 AMC 8
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