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Capstone · Grades 7–9 Keystones #20 20 January 2026 Skills week 4 of 7
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Five GCSE retrieval questions · 20 January 2026 · mathsvault.uk/keystones

  1. 1. Number Dividing in standard form

    Divide: 4.6 × 107 ÷ 6.6 × 104

    Answer: 6.97 × 102
  2. 2. Algebra Solving non-monic quadratics

    Solve: 2x² + 6x + 4 = 0

    Answer: x = -2 or x = -1
  3. 3. Geometry SOHCAHTOA — missing angle

    Adjacent = 18cm, hypotenuse = 27cm. Find the angle

    Answer: 48.2°
  4. 4. Ratio Mixed ratio problems

    Simplify the ratio 7m:700cm

    Answer: 1:100
  5. 5. Statistics Median

    Find the median of: 53, 75, 25, 80, 67, 62, 20, 29, 27

    Answer: 53

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