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Lintel · Grades 5–7 Keystones #1 23 July 2022
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Keystones — Lintel

Five GCSE retrieval questions · 23 July 2022 · mathsvault.uk/keystones

  1. 1. Number

    Add: 7⁄8 + 2⁄3

    Answer: 37⁄24
  2. 2. Algebra

    Factorise: 8x² + 7x

    Answer: x(8x + 7)
  3. 3. Geometry

    Calculate the area of a circle with diameter 22cm

    Answer: 380.13cm²
  4. 4. Ratio

    Simplify the ratio 6m:600cm

    Answer: 1:100
  5. 5. Statistics

    A bag has 4 red and 8 blue balls. What is the probability of picking a red ball?

    Answer: 1⁄3

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