Problem Solving
📚 Starter Activity for Your Maths Lessons
Looking for a quick problem-solving task to get students thinking from the very start of the lesson?
🧠 Challenge your students to find the SUM of 1 + 2 + 3 +...+ 100
🚫 No calculator
💬 Encourage discussion
🔍 Focus on patterns and reasoning rather than lengthy calculations
This task works brilliantly for:
✔ KS3
✔ GCSE
✔ Stretch & challenge
✔ Mathematical reasoning starters
Possible discussion points:
  • Is there a faster method?
  • Can students justify their strategy?
  • Can they find more than one approach?
  • How can they communicate their reasoning clearly?
These are the types of tasks I use regularly to build confidence, problem-solving, and deeper mathematical thinking in the classroom.
Let me know how your students approached it 👇
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Joanna Adamkiewicz
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Problem Solving
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