2013 AMC 8 Problem 6
Attempt Problem 6 of the 2013 AMC 8 below, then check your answer against the video solution and professionally curated solution from LIVE by Po-Shen Loh. You can also try the full timed exam, view all 2013 AMC 8 solutions, or check the answer key.
All problems are used with official legal permission of the Mathematical Association of America (MAA).
6.
The number in each box below is the product of the numbers in the two boxes that touch it in the row above. For example,
What is the missing number in the top row?
Answer: C
Small hint:
Use the product to find the missing number in the second row.
Big hint:
Then use times the top missing number to get that second-row value.
Video solution:
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Written solution:
The product of the numbers in the second row is so the missing number in the middle right box is
Now we know that the product of and the missing number in the first row is Therefore, the missing number is
Thus, C is the correct answer.
Problem 6 in other years
- 1985 AMC 8
- 1986 AMC 8
- 1987 AMC 8
- 1988 AMC 8
- 1989 AMC 8
- 1990 AMC 8
- 1991 AMC 8
- 1992 AMC 8
- 1993 AMC 8
- 1994 AMC 8
- 1995 AMC 8
- 1996 AMC 8
- 1997 AMC 8
- 1998 AMC 8
- 1999 AMC 8
- 2000 AMC 8
- 2001 AMC 8
- 2002 AMC 8
- 2003 AMC 8
- 2004 AMC 8
- 2005 AMC 8
- 2006 AMC 8
- 2007 AMC 8
- 2008 AMC 8
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- 2012 AMC 8
- 2014 AMC 8
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