← piwtf

How to learn pi

You want to learn π. Memorize digits of pi. Know the nth digit. Same urge as everyone who has ever been stuck in a car with a math person.

piwtf.com is a free pi trainer and pi quiz in the browser. No account. Open it and start.

How do I learn pi?

1. Trainer — see the stack, pick the next digit (left / right). This is the pi trainer.
2. Quiz — “What’s the nth digit of π?” 50/50 or Pro Mode. This is the pi quiz.
3. Digit — one giant digit at a time.
4. Pi / Tape — scroll the digits of pi and see how far you are.
5. Rain — Matrix rain, but it’s only π (the pi matrix).

What’s the nth digit of pi?

Digit #1 is 3. 3.14 are the first three digits — not “a three and the first two digits.” The decimal point is punctuation, not a digit.

The 57th digit of pi is 7. The 100th is 7. For any other n, use the app or /pi.txt (ASCII 314159…; digit n is 1-based position n).

I want to learn pi

Then go to piwtf.com, pick Trainer or Quiz, and be slightly humbled. That’s the whole method.