1999 AMC 8 Problem 1

Attempt Problem 1 of the 1999 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 1999 AMC 8 solutions, or check the answer key.

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1.

(6 ? 3)+4(21)=5.(6 \ ? \ 3) + 4 - (2 - 1) = 5. To make this statement true, the question mark between the 66 and the 33 should be replaced by

÷\div

×\times

++

-

None of these

Answer: A
Concepts:order of operations
Difficulty rating: 370
Solution:

We have that 4(21)=41=3. 4 - (2 - 1) = 4 - 1 = 3.

Then (6 ? 3)+3=5 (6 \ ? \ 3) + 3 = 5 6 ? 3=2. 6 \ ? \ 3 = 2.

The only choice that works is ÷.\div.

Thus, A is the correct answer.

Full Exam

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