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Lintel · Grades 5–7 Keystones #1 15 January 2022
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Keystones — Lintel

Five GCSE retrieval questions · 15 January 2022 · mathsvault.uk/keystones

  1. 1. Number

    Simplify: x5 × x2

    Answer: x7
  2. 2. Algebra

    Factorise: 5x² + 8x

    Answer: x(5x + 8)
  3. 3. Geometry

    Adjacent = 19cm, hypotenuse = 24cm. Find the angle

    Answer: 37.7°
  4. 4. Ratio

    Simplify: 6:10:10

    Answer: 3:5:5
  5. 5. Statistics

    A bag has 7 red and 7 blue balls. What is the probability of picking a red ball?

    Answer: 1⁄2

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