oct 25

• Proportions:
• Blob ate three times as many mushrooms as Glob, and Clob ate two times as many as Blob. Together they ate 40 mushrooms. How many each ate?
• Pete had $3, and Paul $4. They bought together 14 rabbits. How many each gets?
•  Find three (or more ways) to cut a square - with straight lines - into two equal parts.
• Do they always intersect at the same point?
• What about a triangle? 
• Learning to count auf Deutsch:
• Funf-und-zwanzig - 25
• Sieben-und-dreißig - 37
• Zwei-und-zwanzig - 22
• Ein-und-zwanzig - 21
• Ein-und-vierzig - 41
• Mayan numbers

• Cut and fold...
• Can one wrap a 1x1x1 cube into 3x3 piece of paper?
• Old puzzle:
  
  

Experiments: sliding magnets

Homework:

Alice and Bob drove 500 miles. Alice drove 3 hours, and Bob 7 (with the same speed) - how many miles each of them drove?  

What numbers are Sieben-und-vierzig, Drei-und-dreißig, Vier-und-vierzig, Funf-und-funfzig?

Find at least three ways to cut by a straight line this triangle into two parts of equal area: