What do you notice about the two crosses?
What is the same?
What is different?
Both crosses use the digits 1, 2, 3, 4, and 5.
The left cross has a horizontal total of 12 and a vertical total of 6.
The right cross has a horizontal total of 8 and a vertical total of 8.
We call the cross on the right a magic cross, because its horizontal total is equal to its vertical total.
Can you find any more magic crosses using the digits 1, 2, 3, 4 and 5?
Can you find all the possibilities? Can you convince yourself you have found them all?