Mind Your Decisions

MindYourDecisions Book Club Announcement. Reading List – Who Gets What and Why By Alvin Roth (Nobel Laureate)

Last month I asked if anyone would be interested in a book club. I was happy to hear a few people liked the idea and wanted more details. I want to keep things simple so here’s what I…

- 3 weeks, 2 days, 14 hours, 57 minutes ago

The High-Low Guessing Game With a Strategic Twist – Game Theory Tuesdays

Today’s problem is a twist on an interview question asked at Microsoft and many tech firms. Problem: I have randomly selected a whole number from 1 to 100. You have to figure out my…

- 3 weeks, 3 days, 14 hours, 52 minutes ago

Mean Girls Math Questions – Sunday Puzzle

The movie Mean Girls (2004) featured a fictional math competition between high school students in Illinois. There is actually a pretty difficult question concerning limits shown in the film…

- 3 weeks, 4 days, 20 hours, 44 minutes ago

This Week In Math (#4): Obamacare Meme, Counter-intuitive PSAT Question, Lego Math

This is the fourth post in my new series that seeks to share the best mathematical content on the web. This week a political meme went viral because people were unable to do simple math, a…

- 3 weeks, 6 days, 19 hours, 32 minutes ago

Viral Exam Question, Killer Robots, And Greece- Game Theory News

Welcome to this month’s “game theory in the news” post that helps students, teachers, and everyone connect game theory with current events. This month’s most popular…

- 1 month, 3 days, 14 hours, 16 minutes ago

Divisibility By 7 Test Using A Graph. Why Does It Work? Sunday Puzzle

How can you tell if a number is divisible by 7? Follow the arrows in this graph! Here’s how it works. Place your finger on the circle labeled “Yes.” Then move a number of…

- 1 month, 4 days, 16 hours, 46 minutes ago

This Week In Math #3: Why cicadas are good at math, the red square puzzle, and understanding the monster group

This is the third post in my new series that seeks to share the best mathematical content on the web. 1. Why are cicadas so good at math? Why might cicadas emerge in cycles of years that…

- 1 month, 6 days, 20 hours, 49 minutes ago

How Mandatory School Vaccinations Solve A Social Dilemma – Game Theory Tuesdays

There should be no controversy. Vaccines save lives and the benefits outweigh the cost and side effects. A 1998 study claiming the MMR (measles-mumps-rubella) vaccine was linked to autism…

- 1 month, 1 week, 3 days, 15 hours ago

This PSAT Math Question Stumped Almost Everyone. Attaching A Tetrahedron To A Pyramid – Sunday Puzzle

Consider a tetrahedron and a square pyramid whose edges have the same length. If the tetrahedron and the pyramid are attached on a triangular face so the vertices align, how many faces…

- 1 month, 1 week, 4 days, 20 hours, 55 minutes ago

This Week in Math: US Team Wins the International Math Olympiad, An Elliptical Pool Table, And Solving The Die Hard Riddle With Mathematical Billiards

This is the third post in my new series that seeks to share the best mathematical content on the web. 1. U.S. Team Wins Math Olympiad The first item is a congratulations to the US Team. …

- 1 month, 1 week, 6 days, 20 hours, 58 minutes ago