Math videos by Presh Talwalkar (studied Mathematics and Economics at Stanford). I post brain teasers, riddles, logic puzzles, viral math problems, and math topics from viewers around the world. 2017 Shorty Awards Nominee. Mind Your Decisions was nominated in the STEM category (Science, Technology, Engineering, and Math) along with winner Bill Nye; nomimees: Adam Savage, Dr. Sandra Lee, Simone Giertz, Tim Peake, Unbox Therapy, Elon Musk, Gizmoslip, Hope Jahren, Life Noggin, and Nerdwriter. Send me your favorite suggestions by email: click on "for business inquiries" or visit my blog to see the address. (I get so many emails that I may not reply, but I consider all suggestions). *I am not accepting sponsors at this time. Thank you. Twitter @preshtalwalkar Check out my books on Amazon! https://www.amazon.com/Presh-Talwalkar/e/B008DKL6VG/ For links in my videos to my own books: as an Amazon Associate I earn from qualifying purchases. This has no effect on the price for you.

8:11

"New" Way To Solve Quadratic Equations That Everyone Is Talking About

Shared 1 month ago

509K views

5:44

The Russian Doll Problem: "I never knew a function could do that!" (Olympiad practice)

Shared 3 months ago

130K views

4:12

When Are 10 Tails In A Row A Statistical Certainty? Fixing Mark Rober's Calculation

Shared 3 months ago

85K views