Packing Problems

estimate the number of objects required to fill a container

How many baseballs fit in a Boeing 747?

estimate the number of objects required to fill a specified volume

How many m&m's would fit in 2 liters?

Covering Problems

estimate the number of objects required to cover another object

How many sheets of paper would it take to cover the earth?

estimate the number of objects required to cover a specified area

pennies to cover 2 square miles

Length Problems

estimate the number of objects required to circle another object

How many grains of rice would it take to stretch around the moon?

estimate the number of objects required to stretch a specified length

number of toothpicks to stretch 10 miles