Grade 9 / Other 38 exercises (including 17 corrected)

• The Pythagorean triplets (4 exercices)
• Open problems (4 exercices)
• Decomposition into prime factors (3 exercices)
• Problems with the PISA survey (3 exercices)
• Lines and affine functions (4 exercices)
• Complex tasks (5 exercices)
• Rotation (7 exercices)