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Make a cube out of straws and have a go at this practical challenge.


Reasoning about the number of matches needed to build squares that share their sides.

Little Boxes

How many different cuboids can you make when you use four CDs or DVDs? How about using five, then six?

World of Tan 1 - Granma T

Age 7 to 11
Challenge Level

Hello, I am Granma T.

I am an elderly business woman living in the Guangdong province of southern China.

My business is Removals! Naturally, I can't do this all on my own.

I have help from my two grandchildren, three workers and a personal assistant. You will meet all of these people when you join us on several adventures in the months to come.

There are seven of us, just as there are seven pieces in the ancient Chinese puzzle, shown here:


Can you complete my silhouette using the seven pieces from the tangram with the interactivity below?

Can you complete the logo of my removal firm?

Extra activities:
  • Can you find out Granma T's age? It is one more than a square number and it has four factors. The sum of the digits of her age is 11.

Find out more about Granma T's business in World of Tan 2 - Little Ming.