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Month Mania
Can you design a new shape for the twenty-eight squares and arrange the numbers in a logical way? What patterns do you notice?
Writing Digits
Lee was writing all the counting numbers from 1 to 20. She stopped for a rest after writing seventeen digits. What was the last number she wrote?
Age 5 to 7
Challenge Level
These drawings were found in La Pileta cave in Spain and could be up to $25 000$ years old.
What do you think these drawings represent?
Could they be about counting things?
What might 'stone-age' people count?
Might they be the earliest known number patterns?
You could try and make up your own way of recording counting.
Click here for a poster of this problem.
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NRICH is part of the family of activities in the Millennium Mathematics Project.
NRICH is part of the family of activities in the Millennium Mathematics Project.