Using the first nine cards from any suit (let the Ace represent one) can you arrange them in a 3x3 square so that the sum of the three cards in any row, column and diagonal are the same?
Here are some other challenges: Can you arrange the cards in a 3x3 square such that:
 none of the sums of the three cards in any row, column and diagonal are the same?
 the sum of the three numbers in each row and each column is a prime number;
 the three 3digit numbers formed in the rows add up to 999;
Solutions to these puzzles are available to those who have a Transum Subscription and are signed in.
You can try similar activities which are online and interactive:
Magic Square 
Unmagic Square 
Prime Square 
Nine Nine Nine 
Square and Even

Do you have any wonderful ideas for using playing cards to help learn mathematics? Please share your ideas here. Playing cards have been around since the ninth century. They were invented in China and spread across Europe in the fourteenth century. Though the designs on the cards have changed over the years the basic number properties have not. Because they are so popular the manufacture of high quality cards is not expensive and makes them an ideal tool for learning mathematics. 
