Summing Circles

Finding the cumulative area of shrinking circles.

Inscribed Circle

Finding an estimation for the area of a circle.

Target Areas

Determine the area of a target formed by concentric circles.

Dalmatian Day

Cut various circles from paper measuring 9 inches by 12 inches. What’s the area of the circles and the percent of paper wasted after cutting out the circles?

Too Many Dogs

Determine how many dogs Elizabeth owns.

Getting Free

How should a prisoner arrange 200 balls so that the prisoner has the greatest possibility of going free?

Matching Socks

Determine the number of socks you should pull out in order to guarantee that you will have a pair.

Mystery Envelopes

Knowing what’s in one envelope, should you keep your envelope or switch and ask for the other one?

Getting on Base

How many hits would you expect your favorite baseball player to have in the next 15 at-bats?

Hitting the Bulls-eye

How many times would you expect to throw the dart until you hit the bulls-eye?