Here's an old one: starting with 0 (or 1) list all the natural numbers using nothing but 4 4s. I'll go first.(adsbygoogle = window.adsbygoogle || []).push({});

0 = (4 - 4)/(4*4)

1 = (4*4)/(4*4)

2 = (4*4)/(4*sqrt(4))

.... etc

**Physics Forums | Science Articles, Homework Help, Discussion**

Dismiss Notice

Join Physics Forums Today!

The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

# Four fours

**Physics Forums | Science Articles, Homework Help, Discussion**