1965 AMC 12 Problem 15
Attempt Problem 15 of the 1965 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 1965 AMC 12 solutions, or check the answer key.
All problems are used with official legal permission of the Mathematical Association of America (MAA).
15.
The symbol represents a two-digit number in the base If the number is double the number then is:
Answer: B
Small hint:
Translate as and as
Big hint:
Solve
Solution:
In ordinary notation, and Thus so
Therefore, the correct answer is B.
Problem 15 in other years
- 1950 AMC 12
- 1951 AMC 12
- 1952 AMC 12
- 1953 AMC 12
- 1954 AMC 12
- 1955 AMC 12
- 1956 AMC 12
- 1957 AMC 12
- 1958 AMC 12
- 1959 AMC 12
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- 1961 AMC 12
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- 1963 AMC 12
- 1964 AMC 12
- 1966 AMC 12
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