Ascher, M. Ethnomathematics  Kasner/Newman Mathematics & Imagination  Tetrahedron  FourSided Block  Big  Large Number Sizes 
Find what should follow 24 in:

"Box" ThinkingThe following visual puzzle defines for many the concept "think outside the box": 
Connect the nine dots by four lines without moving the pencil from the paper 
1. What is half of eleven? Is an integer answer ever correct?? 
More Than Five 
Binary Variation 
2. What is onehalf plus onethird? Is there only one true answer?? 
Baseball Arithmetic 
Resistors Etc. 
3. Can one arrange nine apples in four baskets so there are an odd number of apples in each basket? What computer principle is involved in solving this problem?? 
Distribute Apples 

4. Can one divide a circular pizza pie into eight exactly equal slices with just three straight line cuts? 
Divide Pizza 

Training/Thinking  Visual_Material  Association  About a Limit  Math History  About Size 