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Lintel · Grades 5–7 Keystones #64 5 March 2026 Skills week 3 of 7
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Five GCSE retrieval questions · 5 March 2026 · mathsvault.uk/keystones

  1. 1. Number Multiplying in standard form

    Multiply: 9.9 × 106 × 8.3 × 105

    Answer: 8.22 × 1012
  2. 2. Algebra Solving monic quadratics

    Solve: x² + x - 12 = 0

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

    Adjacent = 27cm, hypotenuse = 42cm. Find the angle

    Answer: 50°
  4. 4. Ratio Reverse percentages

    A price of £863.17 includes a 33% increase. What was the price before the increase?

    Answer: £649.00
  5. 5. Statistics Range

    Find the range of: 21, 31, -14, 31, -16

    Answer: 47

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