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Principle Estimate how many mittens are needed to go around a person.

Principle Starting with a rectangle, keep cutting out the largest possible squares and see what’s left.

Principle Estimate how many macaroni pieces can fit in one cubic meter.

Can you figure out Gabrielle's birthday?

Help Benjamin and his mother get all the shopping done before leaving for vacation. Careful! They don’t want to visit the same place twice!

Ludo is playing with a rope he found in the park and is asking some rather unusual questions. It’s up to you to answer them.

Principle Estimate the amount of toilet paper needed to cover the classroom.