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Lintel · Grades 5–7 Keystones #162 11 June 2026 Skills week 3 of 7
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Five GCSE retrieval questions · 11 June 2026 · mathsvault.uk/keystones

  1. 1. Number Multiplying in standard form

    Calculate: 8 × 103 × 3.2 × 105

    Answer: 2.56 × 109
  2. 2. Algebra Solving monic quadratics

    Solve: x² - 8x + 12 = 0

    Answer: x = -2 or x = -6
  3. 3. Geometry SOHCAHTOA — missing angle

    Adjacent = 30cm, hypotenuse = 44cm. Find the angle

    Answer: 47°
  4. 4. Ratio Reverse percentages

    A price of £858.52 includes a 27% increase. What was the price before the increase?

    Answer: £676.00
  5. 5. Statistics Range

    Find the range of: 46, 46, -11, -6, 43

    Answer: 57

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