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Square Areas

Can you work out the area of the inner square and give an explanation of how you did it?

Square Pegs

Which is a better fit, a square peg in a round hole or a round peg in a square hole?

Lying and Cheating

Follow the instructions and you can take a rectangle, cut it into 4 pieces, discard two small triangles, put together the remaining two pieces and end up with a rectangle the same size. Try it!

Not So Little X

Age 11 to 14
Challenge Level

Two circles are enclosed by a rectangle 12 units by x units.

The distance between the centres of the two circles is x/3 units.

How big is x?

Circles in the box