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Capstone · Grades 7–9 Keystones #168 17 June 2026 Skills week 4 of 7
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Five GCSE retrieval questions · 17 June 2026 · mathsvault.uk/keystones

  1. 1. Number Dividing in standard form

    Divide: 4.8 × 106 ÷ 7.8 × 105

    Answer: 6.15 × 100
  2. 2. Algebra Solving non-monic quadratics

    Solve: 2x² + 12x + 18 = 0

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

    Adjacent = 21cm, hypotenuse = 28cm. Find the angle

    Answer: 41.4°
  4. 4. Ratio Mixed ratio problems

    Simplify the ratio 4m:400cm

    Answer: 1:100
  5. 5. Statistics Median

    Find the median of: 80, 59, 69, 71, 22, 42, 50, 63, 69, 39

    Answer: 63

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