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 sending solutions to these live problems is Monday 2 November.
Live problems
-
problemFavouriteFive Steps to 50
Age5 to 7Challenge level
2 out of 3
Use five steps to count forwards or backwards in 1s or 10s to get to 50. What strategies did you use?
-
problemFavouriteTreasure Hunt
Age7 to 14Challenge level
1 out of 3
Can you find a reliable strategy for choosing coordinates that will locate the treasure in the minimum number of guesses?
Recently solved problems
-
problemFavouriteMaking Sticks
Age5 to 7Challenge level
1 out of 3
Kimie and Sebastian were lining up sticks of lengths two and three. What lengths could they make their lines?
-
problemFavouriteHunting for Averages
Age7 to 11Challenge level
1 out of 3
Can you find the missing number(s)? The square is the average (mean) of the numbers surrounding it.
-
problemFavouriteDoughnut Percents
Age7 to 14Challenge level
2 out of 3
Can you make doughnuts by matching these fractions, decimals and percentages?
-
problemFavouritePlay to 37
Age7 to 11Challenge level
1 out of 3
In this game the winner is the first to make the total 37. Is this a fair game?
-
gameFavouriteDicey Operations
Age7 to 14Challenge level
1 out of 3
In these addition and subtraction games, you'll need to think strategically to get closest to the target.