© MathSphere
www.mathsphere.co.uk
Puzzle time
Tricky twenty triangle
1 2 3 4 5 6 7
8
Put the numbers 1 to 9 in the boxes below so
That each side of the triangle adds up to 20.
Hi!
9
© MathSphere
www.mathsphere.co.uk
Puzzle time
Tricky twenty triangle - answer
There were several
different answers to this.
Only two are included
here.
5
7
7
3
2
8
4
1
9
2
1
6
9
6
3
Well done, if you managed this.
There are many answers - the
key was to make sure that the
three corners added up to 15.
8
4
5