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Three Squares

What is the greatest number of squares you can make by overlapping three squares?

Two Dice

Find all the numbers that can be made by adding the dots on two dice.

Biscuit Decorations

Andrew decorated 20 biscuits to take to a party. He lined them up and put icing on every second biscuit and different decorations on other biscuits. How many biscuits weren't decorated?

Writing Digits

Age 5 to 7
Challenge Level

Lee was recording some numbers:



What do you think she wrote next?
Why do you think that?

Click on the 'Show' button to find out.
 

She continued writing the counting numbers in order but she stopped for a rest after writing seventeen digits.
What was the last number she wrote?

She carried on until she got all the way up to the number 20.  
How many digits has she written altogether now?

Can you find a way to work this out without writing the counting numbers yourself?
The NRICH Project aims to enrich the mathematical experiences of all learners. To support this aim, members of the NRICH team work in a wide range of capacities, including providing professional development for teachers wishing to embed rich mathematical tasks into everyday classroom practice.
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NRICH is part of the family of activities in the Millennium Mathematics Project.