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Capstone · Grades 7–9 Keystones #1 12 December 2021
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Keystones — Capstone

Five GCSE retrieval questions · 12 December 2021 · mathsvault.uk/keystones

  1. 1. Number

    If x2 = 9, what is x?

    Answer: 3
  2. 2. Algebra

    Solve: x⁄2 = 19.5

    Answer: x = 39
  3. 3. Geometry

    Adjacent = 12cm, hypotenuse = 30cm. Find the angle

    Answer: 66.4°
  4. 4. Ratio

    Simplify the ratio 2m:200cm

    Answer: 1:100
  5. 5. Statistics

    The mean of 5 numbers is 33. If 4 of them are 29, 49, 47, 30, what is the missing number?

    Answer: 10

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