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Capstone · Grades 7–9 Keystones #1 13 May 2021
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Keystones — Capstone

Five GCSE retrieval questions · 13 May 2021 · mathsvault.uk/keystones

  1. 1. Number

    Simplify: y2 × y4 × y3

    Answer: y9
  2. 2. Algebra

    Solve: x8 = 2.5

    Answer: x = 20
  3. 3. Geometry

    Adjacent = 20cm, hypotenuse = 37cm. Find the angle

    Answer: 57.3°
  4. 4. Ratio

    Simplify the ratio 4m:400cm

    Answer: 1:100
  5. 5. Statistics

    The mean of 5 numbers is 20. If 4 of them are 18, 43, 30, 48, what is the missing number?

    Answer: -39