PROBLEMS

Clicking on the links will take you to the problem page in a new window, with downloads, links to solution 'think throughs', and other suggested avenues of exploration.  Clicking on the thumbnails will open up a high definition image file of the problem.  For all problems, click here.

F
Fidget-Spinnery

S

Square Pinned on a Hexagon

O

Overlapping Circles

F

Frustrating Primes

S

Santamaths

T

The 12 Days of Christmas

C

Countdown

I

It's π o'clock

T

The Greatest π-day Birthday in History

C

Crescent Area

T

The Sophie Germain Identity

T

The Most Fantastic Magic Square Ever Discovered

T

The Repeating Number

P

Planar Network

S

Vampire Numbers

S

Slices of Cake

S

Smarties in a Box

F

Five Sets

S

Sheep

S

Subfactorial

L

Lego Play

P

Play Your Cards Right

T

Tile Symmetries

B

Balloons

T

The Logical Demonstrator

S

Squares in Squares

F

Fractions of Areas