mathcounts notes
The best math program for middle school students
Monday, January 26, 2015
2015 Mathcounts State/National Prep
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Harder concepts from Mathcounts Mini : Also try the follow-up problems with detailed solutions. Don't do every question. Just the ones ...
Monday, December 15, 2014
2013 AMC 10 A and B : Solutions to the Harder Problems
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From AoPS videos : 2013 AMC 10 A #21 - This is also #17 on the AMC 12 A. 2013 AMC 10 A #22 - This is also #18 on the AMC 12 A. 2013 A...
Sunday, December 7, 2014
Problem Solving Strategies: Applications of the “Choose 2” method
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1. Example: How many diagonals can be drawn for a polygon with “n” sides? Method I: The number of diagonals in a polygon = n(n-3)/2, wher...
Wednesday, November 12, 2014
Unit digit, Tenth digit and Digit Sum
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Word problems on unit digit, tenth digit or digit sum. #1: How many digits are there in the positive integers 1 to 99 inclusive? Sol...
Tuesday, September 23, 2014
Similar triangles, Trapezoids and Triangles that Share the Same Vertices
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Check out Mathcounts here, the best competition math program for middle school students. Download this year's Mathcounts handbook her...
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