mathcounts notes
The best math program for middle school students
Sunday, June 24, 2012
Weird but Delicious Math Questions
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Check out Mathcounts here --the best competition math for middle school mathletes. Problem: (Solution below) #1: 1993 Mathcounts National...
Saturday, June 23, 2012
Mental Math Tricks I
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Multiples of 11: 11 x 14 = 1 ___ 4 , the middle number is (1 + 4) so the answer is 154 Let's try a few calculations mentally. 11 x...
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Saturday, June 16, 2012
Mathcounts strategies: Some sums
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The following sequences are all arithmetic sequences and for any arithmetic sequences, the sum is always average times the terms (how ma...
Monday, June 11, 2012
Painted Cube Problems: Beginning Level
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Please refrain yourself from checking the answers too soon. Use Lego blocks, unit cubes, or Rubik's cubes to help you think. If you are...
Tuesday, June 5, 2012
Polygon Part II: Interior/Exterior angles, Central Angles and Diagonals and Practice Problems
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Learn the Basics here: Polygon Part I Some important notes: #1: Sum of all the interior angle of an n-sided polygon is \((n-2) * 180\) ...
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