100squareA hundred square has been printed on both sides of a piece of paper.

One square is directly behind the other.

What is on the back of 100? 58? 23? 19?

Can you see a pattern?

See the Notes for Teachers.

Click here for an NRICH poster for your classroom wall.

This problem is also available in French.

Tagged with:
 

Leave a Reply

Set your Twitter account name in your settings to use the TwitterBar Section.