You may also like

I'm Eight

Find a great variety of ways of asking questions which make 8.

Noah

Noah saw 12 legs walk by into the Ark. How many creatures did he see?

Five Coins

Ben has five coins in his pocket. How much money might he have?

Let's Investigate Triangles

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.

There are:

  • yellow strips with $3$ holes
  • black strips with $4$ holes,
  • red strips with $5$ holes and
  • green strips with $6$ holes.

There are plenty of strips of each colour. 

Vincent makes a triangle with a green strip, a yellow strip and a red strip.

Tara makes a triangle with two green strips and one red strip and another triangle with three black strips.

two triangles.

How many different triangles can you make with these lengths?

Can you find three strips which cannot be made into a triangle when you use them together?