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Lintel · Grades 5–7 Keystones #1 22 October 2025
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Keystones — Lintel

Five GCSE retrieval questions · 22 October 2025 · mathsvault.uk/keystones

  1. 1. Number

    Calculate: 999 + 509

    Answer: 1508
  2. 2. Algebra

    Solve: x2 = 17

    Answer: x = 34
  3. 3. Geometry

    Opposite = 15cm, adjacent = 18cm. Calculate the angle

    Answer: 39.8°
  4. 4. Ratio

    Calculate 38.3% of 841

    Answer: 322.1
  5. 5. Statistics

    A bag has 7 red and 3 blue balls. What is the probability of picking a red ball?

    Answer: 710