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Math Fair Category: Number Operations

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…

Can’t Stop

Game for 1-4 players. Rules:If one of the roles was a “1” the player scores zero points, otherwise the player scores the sum of his…

Barbanegra the Pirate

The crafty British pirate, Blackbeard (Spaniards called him Barbanegra), had a keen mind for mathematics. The following are excerpts from a diary found in a…

Backwards Population Explosion

How many of you are there?How many parents do you have?How many grandparents?How many great grandparents?How many great great grandparents?How many great great great grandparents?How…

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…

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…

Wolf Nim

This is a game for two wolves. Wolves take turns eating any number of pigs in the same row. The wolf that eats the last…

Walls of Rock

Beaumaris castle in Wales was the largest of the Welsh castles built by King Edward I (r. 1272-1307) Construction began in 1295, but was never…