## 1. Monty Hall Problem

# WRONG!

## Still don't believe it?

Let's say you picked door number 1. Here are all the possibilities of what could happen:

## Wait, you still have doubts?!

...this all assumes you wanted the car and not the goat.

## 2. 0.999... = 1

## 3. There are as many even numbers as natural numbers

## 4. Benford's Law

## 5. The Birthday Paradox

## 6. The Broken Water Heater Problem

## 7. Bertrand's Box Paradox

## 8. How To Estimate π From A Dart Board

## 9. The Harmonic Series Diverges To Infinity

## 10. Your Friends Are Probably More Popular Than You

## 11. A Perfect Parallelogram From A Wacky Shape Every Time

## 12. The Three Prisoners

*The problem first appeared in legendary Martin Gardner's "Mathematical Games" column in Scientific American. *

Source:Walter Hickey / Business Insider