Stage: 1 Short Challenge Level: 
Lee was writing all the counting numbers from $1$ to $20$.
She stopped for a rest after writing seventeen digits. What was the last number she wrote?
Working systematically. Odd and even numbers. Games. Counting. Place value. Multiplication & division. Digit cards. Addition & subtraction. Comparing and Ordering numbers. Factors and multiples.
Published November 1999.
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