Primary Live Problems

Each time you visit the NRICH site there will be some activities which are 'live'. That means we are inviting you to send us your solutions and we will publish a selection of them, along with your name and school. If you'd like to read more about what we're looking for, read this short article.

This set of tasks will stop being live on Monday 4 February. 

Triangle or No Triangle?live

Age 5 to 7 Challenge Level:

Here is a selection of different shapes. Can you work out which ones are triangles, and why?

Birthday Sharinglive

Age 5 to 7 Challenge Level:

It's Sahila's birthday and she is having a party. How could you answer these questions using a picture, with things, with numbers or symbols?

Catrina's Cardslive

Age 5 to 7 Challenge Level:

How would you find out how many football cards Catrina has collected?

Name That Triangle!live

Age 7 to 11 Challenge Level:

Can you sketch triangles that fit in the cells in this grid? Which ones are impossible? How do you know?

Magic Crosseslive

Age 7 to 14 Challenge Level:

Can you find examples of magic crosses? Can you find all the possibilities?


Age 7 to 14 Challenge Level:

I'm thinking of a number. My number is both a multiple of 5 and a multiple of 6. What could my number be?