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Lintel · Grades 5–7 Keystones #63 4 March 2026 Skills week 3 of 7
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Five GCSE retrieval questions · 4 March 2026 · mathsvault.uk/keystones

  1. 1. Number Multiplying in standard form

    Calculate: 5.4 × 104 × 8.7 × 103

    Answer: 4.698 × 108
  2. 2. Algebra Solving monic quadratics

    Solve: x² - 7x + 10 = 0

    Answer: x = -5 or x = -2
  3. 3. Geometry SOHCAHTOA — missing angle

    Opposite = 15cm, adjacent = 18cm. Calculate the angle

    Answer: 39.8°
  4. 4. Ratio Reverse percentages

    A price of £277.20 includes a 20% increase. What was the price before the increase?

    Answer: £231.00
  5. 5. Statistics Range

    Calculate the range of: 39, 38, 74, 52, 32, 72

    Answer: 42

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