Mind Your Decisions

The Pair Of Aces Riddle – Sunday Puzzle

A deck has 4 cards: Ace ♠, Ace ♣, 2 ♠, and 2 ♣. You shuffle the deck and draw 2 cards. What is the probability you drew a pair of aces, if: 1) At least one card is…

- 3 weeks, 6 days, 17 hours, 55 minutes ago

Adults Stumped By Maths Questions For 15 Year Olds. Can You Solve Them?

How hard are math tests? A survey asked 2,000 UK adults to answer sample GCSE test questions intended for 15 year old students. On average, the survey questions were missed by about 40% of…

- 1 month, 2 days, 12 hours, 21 minutes ago

For 15 Million Years, These Lizards Have Played Evolutionary Rock Paper Scissors – Game Theory Tuesdays

DEEP LOOK is a YouTube channel self-described as “a science video series from KQED and PBS Digital Studios that explores big scientific concepts by going very, very small. We shoot in…

- 1 month, 5 days, 11 hours, 27 minutes ago

AA + BB + CC = ABC. Sunday Puzzle

If AA + BB + CC = ABC, what are A, B, and C? The digits are all distinct and positive. Can you figure it out? Watch the video for a solution. Can You Solve This? AA + BB + CC = ABC Or…

- 1 month, 6 days, 17 hours, 22 minutes ago

More Donald Trump And Game Theory: Tit For Tat And Unreleased Tax Returns

Last year in August I was warning the media was underestimating Trump. I suggested his strategy of retaliation, his threat to run as a third party, and his railing against political…

- 1 month, 1 week, 5 days, 11 hours, 18 minutes ago

Snake Eyes Probability Riddle. Sunday Puzzle

You close your eyes and roll a pair of dice. The casino dealer announces that at least one of the rolls is showing a 1. What is the probability that both dice are showing a 1? (Snake eyes…

- 1 month, 1 week, 6 days, 17 hours, 10 minutes ago

Google Is Testing Black Links In Search Results. Why The Major Design Change Came Without Warning. Game Theory Tuesdays

See more of my weekly column Game Theory Tuesdays. Google’s search results typically have blue links for website titles. But over the weekend I, and many people, noticed that the…

- 1 month, 2 weeks, 5 days, 9 hours, 39 minutes ago

Can You Solve The Two Rope Puzzle? Classic Problem And Variation

I posted about this once before, but I wanted to share it in a video so I am posting about it again. You have a lighter and two ropes. Each rope burns up in 60 minutes from end to end. The…

- 1 month, 2 weeks, 6 days, 17 hours, 19 minutes ago

The Formula That Changed How New York Votes: The Banzhaf Power Index. Game Theory Tuesdays

If a county has 6 districts, should each district get an equal vote when making laws? What if the districts have different populations? Would it be fairer to give more votes to some…

- 1 month, 3 weeks, 5 days, 10 hours, 59 minutes ago

Ramanujan’s Radical Brain Teaser – Sunday Puzzle

In 1911, Srinivasa Ramanujan posed this problem involving an infinite nested radical (a never-ending expression that has square roots inside of square roots). What is the value of x in the…

- 1 month, 3 weeks, 6 days, 16 hours, 44 minutes ago