1986 AMC 8 Problem 8
Attempt Problem 8 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).
8.
In the multiplication shown, represents a digit. What is the value of
Answer: E
Small hint:
The units digit of the product is and it comes from
Big hint:
ends in when or the product is large, so test which value works
Solution:
The units digit of the product comes from which ends in only when or Since the product exceeds must be indeed
Thus, the correct answer is E .
Problem 8 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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