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Capstone · Grades 7–9 Keystones #264 21 September 2026 Skills week 4 of 7
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Five GCSE retrieval questions · 21 September 2026 · mathsvault.uk/keystones

  1. 1. Number Dividing in standard form

    Divide: 3.5 × 108 ÷ 6.1 × 106

    Answer: 5.74 × 101
  2. 2. Algebra Solving non-monic quadratics

    Solve: 3x² + 12x + 9 = 0

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

    Adjacent = 16cm, hypotenuse = 33cm. Find the angle

    Answer: 61°
  4. 4. Ratio Mixed ratio problems

    Simplify the ratio 6m:600cm

    Answer: 1:100
  5. 5. Statistics Median

    Find the median of: 22, 29, 67, 79, 51, 68, 69, 52, 26, 71, 42

    Answer: 52

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