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Lintel · Grades 5–7 Keystones #67 8 March 2026 Skills week 3 of 7
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Five GCSE retrieval questions · 8 March 2026 · mathsvault.uk/keystones

  1. 1. Number Multiplying in standard form

    Multiply: 7.8 × 105 × 5.2 × 103

    Answer: 4.06 × 109
  2. 2. Algebra Solving monic quadratics

    Solve: x² - 11x + 28 = 0

    Answer: x = -7 or x = -4
  3. 3. Geometry SOHCAHTOA — missing angle

    Adjacent = 22cm, hypotenuse = 42cm. Find the angle

    Answer: 58.4°
  4. 4. Ratio Reverse percentages

    A price of £283.80 includes a 29% increase. What was the price before the increase?

    Answer: £220.00
  5. 5. Statistics Range

    Calculate the range of: 58, 58, 67, 22, 57, 60

    Answer: 45

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