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 |
Factors and multiples. Investigations. Working systematically. Addition & subtraction. Place value. Combinations. Multiplication & division. Trial and improvement. Visualising. Interactivities.
Published June 2001.
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email: nrich@damtp.cam.ac.uk
