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Lintel · Grades 5–7 Keystones #1 11 November 2025 Skills week 1 of 7
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Keystones — Lintel

Five GCSE retrieval questions · 11 November 2025 · mathsvault.uk/keystones

  1. 1. Number Converting to standard form

    0.00081

    Answer: 8.1 × 10-4
  2. 2. Algebra Factorising monic quadratics

    Factorise: x² + x - 6

    Answer: (x + 3)(x - 2)
  3. 3. Geometry SOHCAHTOA — missing length

    Adjacent = 12cm, angle = 36°. Find opposite

    Answer: 8.7cm
  4. 4. Ratio Mixed ratio problems

    £350.00 is shared between A and B in the ratio 2:5. How much does A receive?

    Answer: £100.00
  5. 5. Statistics Mean

    The mean of 4 numbers is 38. If 3 of them are 46, 37, 23, what is the missing number?

    Answer: 46