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Lintel · Grades 5–7 Keystones #1 3 August 2021
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Keystones — Lintel

Five GCSE retrieval questions · 3 August 2021 · mathsvault.uk/keystones

  1. 1. Number

    Calculate: 1⁄5 + 3⁄4 + 2⁄5

    Answer: 27⁄20
  2. 2. Algebra

    Factorise: 9x² + 7x

    Answer: x(9x + 7)
  3. 3. Geometry

    Adjacent = 20cm, hypotenuse = 39cm. Find the angle

    Answer: 59.1°
  4. 4. Ratio

    Simplify: 15:18:18

    Answer: 5:6:6
  5. 5. Statistics

    A bag has 5 red and 6 blue balls. What is the probability of picking a red ball?

    Answer: 5⁄11

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