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 your school's name. If you'd like to know more about what we're looking for, read this short article.

The last day for sending in solutions to these live problems is Monday 6 December.

Matching Triangleslive

Age 5 to 7
Challenge Level

Can you sort these triangles into three different families and explain how you did it?

Always, Sometimes or Never? KS1live

Age 5 to 7
Challenge Level

Are these statements relating to calculation and properties of shapes always true, sometimes true or never true?

Let's Investigate Triangleslive

Age 5 to 7
Challenge Level

Vincent and Tara are making triangles with the class construction set. They have a pile of strips of different lengths. How many different triangles can they make?

Square Cornerslive

Age 7 to 11
Challenge Level

What is the greatest number of counters you can place on the grid below without four of them lying at the corners of a square?

Egyptian Ropelive

Age 7 to 11
Challenge Level

The ancient Egyptians were said to make right-angled triangles using a rope with twelve equal sections divided by knots. What other triangles could you make if you had a rope like this?