Look carefully at the numbers in the 4 by 4 square.
What do you notice?
Add up the rows. Add up the columns. Add up the diagonals.
The square is magic.
Look carefully at the patterns when you find numbers adding up to 17.
Can you finish off this 5 by 5 magic square?
Remember that each of the numbers 1 to 25 is used once and only once.
Click here for the Notes for Teachers.
Photograph by Lyndon Baker of a seat in the playground of a Danish school.