1969 AMC 12 Problem 3
Attempt Problem 3 of the 1969 AMC 12 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 1969 AMC 12 solutions, or check the answer key.
All problems are used with official legal permission of the Mathematical Association of America (MAA).
3.
If written in base is the integer immediately preceding written in base is:
Answer: E
Small hint:
Subtract from the binary number
Big hint:
Borrow through the three trailing zeros
Solution:
Subtracting from requires borrowing through the three trailing zeros. Thus
Therefore, the correct answer is E.
Problem 3 in other years
- 1950 AMC 12
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