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Finding All Solutions
Shady Symmetry
Age 11 to 14
Challenge Level 
This problem is a good activity for the visualisation of symmetry, and for encouraging students to work systematically.
Isosceles Triangles
Age 11 to 14
Challenge Level
This problem encourages students to use coordinates, area and isosceles triangles to solve a non-standard problem. To find all possible solutions they will need to work systematically.
M, M and M
Age 11 to 14
Challenge Level
This problem offers the students an opportunity to consolidate what they are expected to know about mean, mode and median whilst also challenging them to work systematically, and justify their reasoning
Peaches Today, Peaches Tomorrow...
Age 11 to 14
Challenge Level
This problem could replace repetitive textbook work on calculating fractions of integers. It offers plenty of practice of these calculations while requiring students to come up with problem-solving strategies.