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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.
The last day for sending solutions to these live problems is Monday 17 June.
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?
How many ways can you find to do up all four buttons on my coat? How about if I had five buttons? Six ...?
How many solutions can you find to this sum? Each of the different letters stands for a different number.
An ordinary set of dominoes can be laid out as a 7 by 4 magic rectangle in which all the spots in all the columns add to 24, while those in the rows add to 42. Try it! Now try the magic square...
Take a look at these recently solved problems.
Are these statements relating to calculation and properties of shapes always true, sometimes true or never true?
Choose four of the numbers from 1 to 9 to put in the squares so that the differences between joined squares are odd.
In this activity, the computer chooses a times table and shifts it. Can you work out the table and the shift each time?
This multiplication uses each of the digits 0 - 9 once and once only. Using the information given, can you replace the stars in the calculation with figures?
Which pairs of cogs let the coloured tooth touch every tooth on the other cog? Which pairs do not let this happen? Why?