Thursday, January 25, 2001

*Quiz 1*

- What did the Egyptians use to construct a right angle?
- Describe in a sentence the relation between Pythagoras and the Pytagorean theorem.
- Who is the "first philosopher"?
- What is the author's explanation for the fact that Chinese children can in average recite longer series of numbers than American children of the same age?
- Say when the last ice age was, or why was it mentioned in class.

A cord with knots. (*Osserman*, page 4).

Pythagoras (or one of his followers) stated the
theorem in general and gave a proof for it. Implicitly it was well known
already to the Egyptians and Babylonians. (*Osserman*, page
4).

Thales of Miletus. (Lecture)

The Chinese number system is superior: it is
more systematic and there are less and shorter words for numbers. (*Dehaene*,
page 102-106).

It was mentioned because around that time people started to settle, thus having more time and more needs for mathematics. The last ice age was 12000-10000 B.C. (Lecture)