Stage: 2 Challenge Level: 
| 1 | 2 | 3 | 4 | 5 | 6 | 7 | ... | 97 | 98 | 99 |
| 99 | 98 | 97 | 96 | 95 | 94 | 93 | ... | 3 | 2 | 1 |
| 100 | 100 | 100 | 100 | 100 | 100 | 100 | ... | 100 | 100 | 100 |
Factors and multiples. Combinations. Investigations. Interactivities. Working systematically. Multiplication & division. Trial and improvement. Addition & subtraction. Place value. Generalising.
Published December 1999.
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