Stage: 1 Challenge Level: 
You could help the pumpkin people get to Froggie by starting at $30$ and travelling to $3$, always skipping onto a square that is $3$ less than the square they have skipped from.
Odd and even numbers. Factors and multiples. Interactivities. Prime numbers. Addition & subtraction. Investigations. Working systematically. Arithmetic sequence. Trial and improvement. Multiplication & division.
Published October 2001.
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