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Cornerstone · Grades 3–5 Keystones #1 17 September 2018 Skills week 1 of 7
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Keystones — Cornerstone

Five GCSE retrieval questions · 17 September 2018 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Calculate: 8⁄10 + 1⁄10

    Answer: 9⁄10
  2. 2. Algebra Two-step equations

    Solve: 4x - 15 = 25

    Answer: x = 10
  3. 3. Geometry Pythagoras — hypotenuse

    Calculate the hypotenuse when a = 12cm and b = 9cm

    Answer: 15cm
  4. 4. Ratio Sharing in a ratio

    Share 95 in the ratio 2:3

    Answer: 38 and 57
  5. 5. Statistics Mean

    Calculate the mean of: 9, 33, 20, 35, 32, 20

    Answer: 24.8

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