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2015 Mathcounts Chapter / State Prep : Octagon
Question #1: How to find the area of a regular octagon. method I: The area of a regular octagon can be obtained by using 45-45-90 degree angle ratio to get the sidesand from there get the area.method...
View ArticleThis Week's Work : Week 1 -- for Inquisitive Young Mathletes
Math is Fun : Throwing Two DiceMathcounts Mini on DiceInvestigating: Interactive 3-D Shapes mental math practicesThis year's Mathcounts handbook
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Rate, Time, and Distance Question
Question: Harder SAT question: Esther drove to work in the morning at an average speed of 45 miles per hour. She returned home in the evening along the same route and averaged 30 miles per hour. If...
View ArticleSequences and Series : level I
From Mthcounts Mini: Sequences and SeriesEasier concepts:SequencesArithmetic sequence/determine the nth term Arithmetic and geometric sequencesMathcounts strategies : review some sums Note : Don't just...
View Article2014 Mathcounts State Prep : How to Avoid Making Careless Mistakes
Why Can Some Kids Handle Pressure While Others Fall Apart? from the New York TimesRelax! You'll Be More Productive from the New York TimesFirst, please read Mathcounts "Forms of Answers" carefully for...
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Hints/links or Solutions to 2014 Harder Mathcounts State Sprint and Target...
Finally, 2014 Mathcounts state are clear for discussions.  You can download this year's Mathcounts state problems here at Mathcounts.org. Links, notes, Hints or/and solutions to this year's...
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2013 Mathcounts State Harder Problems
You can download this year's Mathcounts state competition questions here.Trickier 2013 Mathcounts State Sprint Round questions : Sprint #14: From Varun: Assume the term "everything" refers to all...
View Article2015 Mathcounts Competition Preparation Strategies
It's the Mathcounts state, AIME/USAJMO/USAMO and science fair/bowl/olympiad/robotics/spelling bee/... season. Yeah !! Don't forget other equally interesting activities/contests, which engage your...
View Article2015 Mathcounts State Prep: Simon's Favorite Factoring Trick
Check out Mathcounts here, the best competition math program for middle school students. Download this year's Mathcounts handbook here.The most common cases of Simon's Favorite Factoring Trick are:I:...
View ArticleSome Articles to Read and Ponder after Mathcounts Chapter Competition
For those students who really love problem solving, who care and are inquisitive but are disappointed at their chapter's/state's performance, I want to let you know that it's an honor meeting you...
View ArticleMass Points Geometry
Some of the harder/hardest questions at Mathcounts can be tackled at ease using mass point geometryso spend some time understanding it. Mass Point Geometry : This one is easier to understand with...
View ArticleLearn How to Learn by BOGTRO from AoPS forum -- Thanks a bunch !!
I love the following quotes :Insanity: doing the same thing over and over again and expecting different results.I previously thought it's from Albert Einstein, but it's not. I love it anyway. You can...
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Harder Mathcounts State Question
2012 Mathcounts State Sprint #30: In rectangle ABCD, shown here, point M is the midpoint of side BC, and point N lies on CD such that DN:NC = 1:4. Segment BN intersects AM and AC at points R and S,...
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Games: logical puzzle: the wolf, the sheep and the cabbages
Logical games:How to cross the river without the wolf eating the sheep, the sheep eating the cabbages.Here is the link to the puzzle "the wolf, the sheep and the cabbages".Two versions of "Leap Frog...
View ArticleShow Your Work, Or, How My Math Abilities Started to Decline
Show your work, or, how my math abilities started to declineI think it's problematic the way schools teach Algebra. Those meaningless show-your-work approaches, without knowing what Algebra is truly...
View ArticleBase Numbers: Level 1
Base numbers: Convert other bases to base 10. Example #1: 1 | 0 |02 22|21 |20 0*20 + 0*21 + 1*22 = 4Thus, 1002 = 4 in base 10The first few base 2 (or binary system) numbers that...
View ArticleTestimonials for my services. So far, most through words of mouth or chance...
Dear Mrs Lin,I just did not get the opportunity earlier to thank you for all your help. _____ was able to make to the National MathCounts largely because of your excellent guidance and coaching. I do...
View ArticleProblem Solving Strategies : Complementary Counting
Check out Mathcounts here, the best competition math program for middle school students. Download this year's Mathcounts handbook here.Video to watch on complementary counting from "Art of Problem...
View ArticleProblem Solving Strategy: Complementary Counting
#: How many three digit numbers contain the digit "9" at least once?Solution:For the "at least" questions: a lot of the time, the easiest way to solve the problems is to use the total number of ways...
View ArticleLogical games, puzzles and links for summer learning or/and having fun together
You can play daily SET in the New York Times Or the official SET website : The Daily SET Puzzle Math is Fun Arithmetic Game Sunshine math Sunshine math answer key and detailed explanations
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