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Capstone · Grades 7–9 Keystones #266 23 September 2026 Skills week 4 of 7
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Keystones — Capstone

Five GCSE retrieval questions · 23 September 2026 · mathsvault.uk/keystones

  1. 1. Number Dividing in standard form

    Divide: 1.4 × 106 ÷ 7.9 × 106

    Answer: 1.77 × 10-1
  2. 2. Algebra Solving non-monic quadratics

    Solve: 2x² + 12x + 16 = 0

    Answer: x = -2 or x = -4
  3. 3. Geometry SOHCAHTOA — missing angle

    Adjacent = 28cm, hypotenuse = 39cm. Find the angle

    Answer: 44.1°
  4. 4. Ratio Mixed ratio problems

    In ratio 1:1:3, what fraction is the second part?

    Answer: 1⁄5
  5. 5. Statistics Median

    Find the median of: 70, 72, 74, 25, 54, 80, 44, 76, 51

    Answer: 70

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