What Is 2 + 2 X 4 = ? Viral Math Problem – Mind Your Decisions

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Book ratings are from January 2026.

(US and worldwide links) https://mindyourdecisions.com/blog/my-books

Mind Your Decisions is a compilation of 5 books:

(1) The Joy of Game Theory: An Introduction to Strategic Thinking (2) 40 Paradoxes in Logic, Probability, and Game Theory (3) The Irrationality Illusion: How To Make Smart Decisions And Overcome Bias (4) The Best Mental Math Tricks (5) Multiply Numbers By Drawing Lines

The Joy of Game Theory shows how you can use math to out-think your competition. (rated 4.2/5 stars on 587 reviews)

40 Paradoxes in Logic, Probability, and Game Theory contains thought-provoking and counter-intuitive results. (rated 4.3/5 stars on 83 reviews)

The Irrationality Illusion: How To Make Smart Decisions And Overcome Bias is a handbook that explains the many ways we are biased about decision-making and offers techniques to make smart decisions. (rated 4.3/5 stars on 56 reviews)

The Best Mental Math Tricks teaches how you can look like a math genius by solving problems in your head (rated 4.4/5 stars on 155 reviews)

Multiply Numbers By Drawing Lines This book is a reference guide for my video that has over 1 million views on a geometric method to multiply numbers. (rated 4.5/5 stars on 57 reviews)

Mind Your Puzzles is a collection of the three “Math Puzzles” books, volumes 1, 2, and 3. The puzzles topics include the mathematical subjects including geometry, probability, logic, and game theory.

Math Puzzles Volume 1 features classic brain teasers and riddles with complete solutions for problems in counting, geometry, probability, and game theory. Volume 1 is rated 4.4/5 stars on 144 reviews.

Math Puzzles Volume 2 is a sequel book with more great problems. (rated 4.1/5 stars on 46 reviews)

Math Puzzles Volume 3 is the third in the series. (rated 4.2/5 stars on 39 reviews)

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