Mind Your Decisions

The Cigarette Riddle And Trailing Zeroes In 1000 Factorial

Problem 1 A miser can make 1 cigarette from 5 cigarette butts. What is the most number of cigarettes the miser can make from 1,000 cigarette butts? Problem 2 I have posted about this…

- 1 month, 2 days, 9 hours, 6 minutes ago

BuzzFeed’s Cookie Math Problem Is Wrong

Yesterday BuzzFeed posted a “simple cookie math problem” that already has over 400,000 views. You can try out the quiz to see how you do: Can You Solve This Simple Cookie Math…

- 1 month, 3 days, 3 hours, 13 minutes ago

Possible “Major Breakthrough” In Game Theory: Discrete And Bounded Envy-Free Cake Cutting Protocol

What is the fairest way to split the bill? How should an estate be divided amongst heirs? How can two siblings divide a peanut butter sandwich? These are all examples of a game theory topic…

- 1 month, 1 week, 1 day, 3 hours, 27 minutes ago

The 3 Card Riddle – Sunday Puzzle

I previously ran a similar problem in a post about 3 coins. This post includes a video which also presents a numerical simulation to demonstrate the theoretical calculation. I have a 3…

- 1 month, 1 week, 2 days, 8 hours, 13 minutes ago

The Flower Math Problem – Chinese Kindergarten Test Question Stumps Adults

Allegedly this problem comes from a test given to a Chinese kindergarten class (5 year olds). It caused a stir after it was posted online, with many adults debating the answer, some saying…

- 1 month, 1 week, 5 days, 5 hours, 15 minutes ago

Why Do Companies Pay $7 Billion To Help You Save On Prescription Drugs? A Tragedy Of The Commons – Game Theory Tuesdays

image by StockMonkeys.com via flickr. CC BY 2.0 Let’s say you get a physical and your doctor recommends a cholesterol lowering medicine. You can either be on a brand name drug or a…

- 1 month, 2 weeks, 1 day, 1 hour, 39 minutes ago

This Marriage Logic Puzzle Stumps 80 Percent. Sunday Puzzle

Alice is looking at Bob, and Bob is looking at Charlie. Alice is married and Charlie is unmarried. Is a married person looking at an unmarried person? A) Yes B) No C) Cannot be determined…

- 1 month, 2 weeks, 2 days, 10 hours, 48 minutes ago

Geometry Problems For Kids Stump Adults – Can You Solve Them?

Can you find the perimeter of each composite rectilinear shape? These problems caused a stir when they were assigned to 10 year olds in England. Some parents felt the problems were too…

- 1 month, 3 weeks, 7 hours, 8 minutes ago

The Game Theory Of Being FIRST! Lessons From The War Of Attrition – Game Theory Tuesdays

Seconds after posting a video on YouTube, I leave a clarifying comment. But it’s too late. In the few seconds I took to write the comment, there are already 100 views and 4 comments.…

- 1 month, 3 weeks, 1 day, 2 hours, 18 minutes ago

Shuffling Cards Probability Riddle – Sunday Puzzle

You open a brand new deck of cards, and the cards are arranged in increasing order by the suits hearts, clubs, diamonds, and spades. The 10th card, for example, is the 10 of hearts. There…

- 1 month, 3 weeks, 2 days, 9 hours, 38 minutes ago