Or search by topic
Well done to everybody who had a go at these challenges.
Ronik from Clarendon Primary School in the UK found this solution for Challenge 2:
5+2+1=8
5+3+1=9
4+4+2=10
Well done, Ronik! Amogh from Ashton House School in the UK sent in this solution for Challenge 2:
For Challenge 2, I have come up with one solution
1+2+5=8
4+3+2=9
4+5+1=10
No number has been used more than two times, so I think it is correct.
That is correct, Amogh! Some children from Hauxton Primary School in the UK found the same solution for Challenge 2, and they added:
We think there are more possible answers!
I agree!
We received lots of solutions from the children at Broke Hall CP School in Suffolk, England. Rajavel and Maxwell found this solution for Challenge 2:
4+1+3=8
5+2+2=9
5+1+4=10
Mario, Robbie, Evie and Owen found this solution for Challenge 2:
4+2+2=8
5+3+1=9
5+4+1=10
Thank you all for sending these ideas in. I think there is still one possible solution to Challenge 2 that nobody has found yet - please email us if you think you know what it is.
There are a lot of possible solutions for Challenge 3. Ronik sent in this one:
5+4+1+1
4+4+3+1
5+3+3+2
Rajavel and Maxwell sent in this solution for Challenge 3:
1+2+3+5
1+3+3+5
2+2+4+5
Mario and Robbie sent in this solution:
1+2+3+5
1+2+4+5
1+3+4+5
Evie and Owen found both of these solutions, and they also found these different solutions:
1+2+3+5
2+2+3+5
1+3+4+5
1+1+4+5
2+2+3+5
1+3+4+5
1+1+4+5
1+2+4+5
2+2+4+5
Well done to all of you for your hard work on this! Take a look at Broke Hall's full solutions to see their explanations of how they worked systematically by starting with the smallest numbers.