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2011 Mathcounts Chapter Sprint Round solutions
#22: The answer is 2674. See left for explanations.#23: Let the two consecutive positive integers be x and x + 1.( x + 1 ) / x = 1.02, x + 1 = 1.02x, 0.02x = 1, x = 1 divided by 0.02 = 1 times 100/2 =...
View ArticleGeometric mean of a right triangle
Geometric mean of a right triangle :Video tutorial NotesPractice I Practice II : focus on the height (or altitude)Practice III : focus on the legs
View ArticleAMC-8 prep
Below are Mathcounts Minis that you can watch and learn for the AMC 8 prep as well.Mathcounts Minis : Areas of Irregular Convex PolygonsSeeing Patterns to Make Problems Easier Part ISeeing Patterns to...
View Article2014 AMC 8 Results , Problems, Answer key and Detailed Solutions.
E-mail me if you want to join my group lessons for Mathcounts/AMCs prep.Different groups based on your current level of proficiency.My students are amazing. They NEVER stop learning and they don't just...
View Article2019 AMC 8 problems, solutions and some thoughts
2019 AMC 8 problems and solutions, for students, by studentsA student's reflection on this year's test : Mrs. Lin,I did the AMC 8 yesterday, and it was actually quite easier than last year. I was...
View Article2020 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:...
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Face Diagonal and Space Diagonal of a Rectangular Prism
Face diagonal and space diagonal of a cube Ways to calculate face and space diagonal.Each side of the cube is x units long.Use 45-45-90 degree angle ratio( 1 - 1 -√ 2 ) or Pythagorean theorem to get...
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Dimensional Change
There are lots of questions on dimensional change and this is a very common one.Make sure you understand the relationship among linear, 2-D (area) and 3-D (volume) ratio.There are many similar...
View Article16 17 Mathcounts handbook more interesting questions that have nicer solutions
Thanks to Achuth for trying out these questions and time them as an actual Mathcounts test. :) First week : warm up 1, 4, 7. (time for 40 mins. like sprint)Second week : warm up 2, 5, 8.third week :...
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2015 Mathcounts State Prep: Mathcounts State Harder Questions
Check out Mathcounts here, the best competition math program for middle school students. Download this year's Mathcounts handbook here.Question:2010 Mathcounts State Team Round #10: A square and...
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2012 Harder Mathcounts State Target Questions
Check outMathcounts here -- the best competition math program for middle schoolers up to the state and national level. # 6: A semicircle and a circle are placed inside a square with sides of length 4...
View ArticleSum of All the Possible Arrangements of Some Numbers
Check out Mathcounts, the best middle school competition math program up to the national level. Questions to ponder: (detailed solutions below) It's extremely important for you to spend some time...
View ArticleV's record
V's record 2010 chapter sprint: Hi, I got a score of 22 and got questions 16, 22, 23, 24,25,27,29, and 30 wrong. I just guessed these questions because I didn't really find a way to do them.2011-12...
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Pathfinder
From Mathcounts Mini :Counting/Paths Along a Grid From Art of Problem Solving Counting Paths on a Grid Math Principles : Paths on a Grid : Two Approaches Question #1: How many ways to move the...
View ArticleAnt’s record
2001 AMC 8 first weekThe questions that I didn’t do are: 8, 13, 14 18, 19, 20, 22, 23, 24, 25. Out of the ones the ones I did do, I got number 16 wrong.
View ArticleAnt., Oct. 2nd
2002 AMC 8 from Ant.The questions I didn’t do are: 5, 20, 21, 22, 23, 24, 25. Out of the ones I did do I got 14 and 19 wrong. I also spent 45 minutes on these questions
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Square Based Pyramid of Equal Edges: Vomume and Surface Area
The height of a square based pyramid of equal edges is half of its base diagonal. You should be able to figure out the volume as well as surface area of a square based pyramid once you understand how...
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Sequences and Series -- Arithmetic and Geometric Sequences
Sequences are fun to learn and not really that difficult. There are many similarities between arithmetic and geometric sequences, so learn both together. Enjoy !!!!! From Mthcounts Mini: Sequences and...
View ArticleMathcounts prep
Hi, Thanks for visiting my blog.E-mail me at thelinscorner@gmail.com if you want to learn with me. :) :) :) Currently I'm running different levels of problem solving lessons, and it's lots of fun...
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