Tag Archives: number

Triangular number equations via pictures: solutions

Posted on April 14, 2011 by Brent

Here are some solutions to my previous post. However, they are almost certainly not the only solutions! If you have other cool ways to visualize any of these (or any other triangular number equations) feel free to post in the … Continue reading →

Posted in arithmetic, pattern, pictures, proof, solutions | Tagged , , , | 10 Comments

Who Am I?

Posted on November 29, 2009 by Brent

An excellent puzzle from JD2718: There are five true and five false statements about the secret number. Each pair of statements contains one true and one false statement. Find the trues, find the falses, and find the number. 1a. I … Continue reading →

Posted in challenges, logic, number theory, puzzles, teaching | Tagged , , | 13 Comments

Number bracelets

Posted on November 17, 2009 by Brent

Recently I’ve been volunteering with the middle school math club at Penn Alexander, a PreK-8 school in my neighborhood. Today we did (among other things) a fun activity I’d never seen before, called “number bracelets”. The students seemed to enjoy … Continue reading →

Posted in arithmetic, iteration, pattern, sequences, teaching | Tagged , , , | 12 Comments