My younger son has been learning a little bit about square roots over the last couple of weeks and I thought it would be fun to show him some proofs that the square root of 2 is irrational. 340 more words

## Tags » Continued Fractions

#### A Girl's Thoughts On Continued Fractions

I discussed continued fractions recently, and with some controversy. So I imagine people might be interested in another view.

Friday’s post on the **MathsByAGirl** blog is on the subject. 20 more words

#### CALENDARS AND FRACTIONAL APPROXIMATION

Have you ever wondered what a calendar is? How would you explain the notion of a calendar to an alien, albeit a very precocious one with some notion of homo sapiens common sense? 1,518 more words