Arrange the numbers 1 to 6 in each set of circles below. The sum of each side of the triangle should equal the number in its centre.
Use cubes to continue making the numbers from 7 to 20. Are they sticks, rectangles or squares?
If you have ten counters numbered 1 to 10, how many can you put
into pairs that add to 10? Which ones do you have to leave out?
Thank you for your solutions to this problem.
Many of you were careful to say that you only counted numbers
BETWEEN the two numbers given, so you didn't include the numbers
themselves. That's important to get clear, I think.
Matthew and Luca from Dunchurch Boughton
Junior School described what they noticed:
Moana from the Canadian Academy explained what
Matthew and Luca noticed by saying:
James from Edenlode wrote:
I wonder what happens when you start on an odd
number and land on an even number? Or if you start on an odd
number and land on an odd number? James also asked "Do you
notice anything about my exclamation marks?".
Perhaps some of you thought about it in
a slightly different way? Let us know if you