# Math Fair Category: Number Concepts

## Cold Potato

Katrina and her class are on a camping trip. Today, everyone gets a single potato for supper. It’s not much, but at least they should…

The people of Utopia had divided into two political parties. The “Bread & Butter” party offered daily bread & butter to all the people. The…

## Bob The Building

Bob the Building has only one elevator, so as people leave for work (going from floors 1-6 to the ground floor) or come home from…

## Babushka Squares

In this investigation, we work with pentominoes, five squares, and triominoes, 3 squares, where we study the unique shapes from constructing them in all different…

## Training Trains

When in grade 1, locomotives learn by going round and round in circles on specially created tracks like the one on the right. The circular…

## Un-Babushka Squares

When, Polyo, wants to rebel from her claustrophobic family, she seeks out solitude to work on very Un-Babushka-like puzzles. That means she wants puzzles where…

## Yasmin the Yeti

Yasmin, a baby Yeti living with her family in the Himalayas, decided that she was going to make trees out of paper. She folded a…

## Urns of King Midas

King Midas made 4 Urns to carry his gold bars. For good luck he wrote a 4 digit number – one digit on each urn.…

## Unique Buildings

You are the mayor of a small town and are given the mandate to build 10 floors of residential housing. For example, you could build…

## Twinkle Twinkle

Carl Sagan and Joseph Campbell were walking on the Milky Way last evening. Carl turned to Joseph and said “What a lot of stars!” “But…