Each time you visit the NRICH site there will be some activities which are 'live'. This means we are inviting students to send us solutions, and we will publish a selection of them, along with each student's name and their school, a few weeks later. If you'd like to know more about what we're looking for, read this short article.
Live problems
No live problems at the moment
Recently solved problems
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problemFavouriteMore Less Is More
Age7 to 14Challenge level
1 out of 3
In each of these games, you will need a little bit of luck and your knowledge of place value to develop a winning strategy.
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gameFavouriteMore Dicey Operations
Age7 to 14Challenge level
1 out of 3
In these multiplication and division games, you'll need to think strategically to get closest to the target.
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problemFavouriteUnequal Averages
Age11 to 14Challenge level
2 out of 3
Play around with sets of five numbers and see what you can discover about different types of average...
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problemFavouriteIsosceles Triangles
Age11 to 14Challenge level
1 out of 3
Draw some isosceles triangles with an area of $9cm^2$ and a vertex at (20,20). If all the vertices must have whole number coordinates, how many is it possible to draw?
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problemFavouriteSimplifying Doughnut
Age14 to 16Challenge level
2 out of 3
Can you match up these equivalent algebraic expressions?
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problemFavouriteNegative Powers
Age14 to 18Challenge level
2 out of 3
What does this number mean? Which order of 1, 2, 3 and 4 makes the highest value? Which makes the lowest?
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problemFavouriteMultiple Surprises
Age11 to 16Challenge level
1 out of 3
Sequences of multiples keep cropping up...