Stage: 2 Challenge Level: 
How many solutions can you find to this alphanumeric? Each of the different letters stands for a different number.
| T | W | O | ||
| + | T | W | O | |
| -- | -- | -- | -- | -- |
| F | O | U | R |
A poster of this problem is available
here.
Multiplication & division. Visualising. Investigations. Place value. Trial and improvement. Interactivities. Addition & subtraction. Combinations. Working systematically. smartphone.
Published June 2001.
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