1992 AMC 8 Problem 6
Attempt Problem 6 of the 1992 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 1992 AMC 8 solutions, or check the answer key.
All problems are used with official legal permission of the Mathematical Association of America (MAA).
6.
A triangular expression with top entry , lower-left entry , and lower-right entry means , as shown below. What is the indicated sum?
Answer: D
Small hint:
Apply the rule to each triple separately: top plus lower-left minus lower-right
Big hint:
Compute and then add the two results
Solution:
The first triple gives and the second gives
Their sum is
Thus, the correct answer is D .
Problem 6 in other years
- 1985 AMC 8
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