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Lintel · Grades 5–7 Keystones #1 22 May 2021
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Keystones — Lintel

Five GCSE retrieval questions · 22 May 2021 · mathsvault.uk/keystones

  1. 1. Number

    What is the missing number: 39 + ? = 139

    Answer: 100
  2. 2. Algebra

    Solve: 4x = 24

    Answer: x = 6
  3. 3. Geometry

    Adjacent = 23cm, hypotenuse = 40cm. Find the angle

    Answer: 54.9°
  4. 4. Ratio

    Find 61% of 342

    Answer: 208.62
  5. 5. Statistics

    A bag has 5 red and 8 blue balls. What is the probability of picking a red ball?

    Answer: 5⁄13

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