Each time you visit the NRICH site there are usually 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.
The last day for submitting solutions to these live problems is Monday 14 October.
Live problems
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problemFavouriteRound the Three Dice
Age7 to 11Challenge level
What happens when you round these three-digit numbers to the nearest 100?
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problemFavouriteLots of Lollies
Age5 to 7Challenge level
Frances and Rishi were given a bag of lollies. They shared them out evenly and had one left over. How many lollies could there have been in the bag?
Take a look at these recently solved problems.
Recently solved problems
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problemFavouriteDoubling Fives
Age5 to 7Challenge level
This activity focuses on doubling multiples of five.
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problemFavouriteTwo and Two
Age7 to 16Challenge level
How many solutions can you find to this sum? Each of the different letters stands for a different number.
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problemFavouriteGot It
Age7 to 14Challenge level
A game for two people, or play online. Given a target number, say 23, and a range of numbers to choose from, say 1-4, players take it in turns to add to the running total to hit their target.
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problemFavouriteTangram Tangle
Age5 to 7Challenge level
If you split the square into these two pieces, it is possible to fit the pieces together again to make a new shape. How many new shapes can you make?
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problemFavouriteButton-Up Some More
Age7 to 11Challenge level
How many ways can you find to do up all four buttons on my coat? How about if I had five buttons? Six ...?