I have put a new puzzle up. Nothing too tough this time. A classic algebra puzzle, which I have found to be pretty good as a test of how well GCSE/A-level students understand some basic points of algebra, while illustrating some important problem solving skills.

**#4: Hidden depths…
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*A classic algebra puzzle.*

**02/06/2015**

Published:Published:

**Difficulty:*****Maths knowledge required:**GCSE algebra [i.e. 14-16 year olds]. Although KS3 would do…

Click **HERE** to access the puzzle.

The solution will go up in a day or two.