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Lintel · Grades 5–7 Keystones #161 10 June 2026 Skills week 3 of 7
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Five GCSE retrieval questions · 10 June 2026 · mathsvault.uk/keystones

  1. 1. Number Multiplying in standard form

    Multiply: 2 × 107 × 7.2 × 106

    Answer: 1.44 × 1014
  2. 2. Algebra Solving monic quadratics

    Solve: x² + 0x - 4 = 0

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

    Opposite = 19cm, adjacent = 13cm. Calculate the angle

    Answer: 55.6°
  4. 4. Ratio Reverse percentages

    A price of £963.48 includes a 24% increase. What was the price before the increase?

    Answer: £777.00
  5. 5. Statistics Range

    Calculate the range of: 79, 79, 52, 101, 32, 55

    Answer: 69

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