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?

Click here for the HUNDRED SQUARE Notes for Teachers.

Click here for the HUNDRED SQUARE worksheet

Click here for an NRICH poster for your classroom wall.

Click here for a 1-400 square

This problem is also available in French.

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