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Lintel · Grades 5–7 Keystones #67 8 March 2026
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Keystones — Lintel

Five GCSE retrieval questions · 8 March 2026 · mathsvault.uk/keystones

  1. 1. Number

    What is the missing number: 38 + ? = 107

    Answer: 69
  2. 2. Algebra

    What is the next term? 4, 12, 36, 108, ...

    Answer: 324
  3. 3. Geometry

    Adjacent = 21cm, hypotenuse = 26cm. Find the angle

    Answer: 36.1°
  4. 4. Ratio

    Simplify: 24:16:24

    Answer: 3:2:3
  5. 5. Statistics

    A bag has 5 red and 6 blue balls. What is the probability of picking a red ball?

    Answer: 511