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Capstone · Grades 7–9 Keystones #1 7 October 2021
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Keystones — Capstone

Five GCSE retrieval questions · 7 October 2021 · mathsvault.uk/keystones

  1. 1. Number

    If x2 = 16, what is x?

    Answer: 4
  2. 2. Algebra

    Expand: 4(6x - 7)

    Answer: 24x - 28
  3. 3. Geometry

    Adjacent = 24cm, hypotenuse = 37cm. Find the angle

    Answer: 49.6°
  4. 4. Ratio

    Calculate 18.8% of 226

    Answer: 42.49
  5. 5. Statistics

    The mean of 5 numbers is 36. If 4 of them are 36, 36, 22, 39, what is the missing number?

    Answer: 47

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