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Cornerstone · Grades 3–5 Keystones #1 12 August 2021 Skills week 1 of 7
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Five GCSE retrieval questions · 12 August 2021 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Calculate: 8⁄11 + 1⁄11

    Answer: 9⁄11
  2. 2. Algebra Two-step equations

    Solve: 5x - 8 = 52

    Answer: x = 12
  3. 3. Geometry Pythagoras — hypotenuse

    Find the hypotenuse of a right triangle with sides 5cm and 12cm

    Answer: 13cm
  4. 4. Ratio Sharing in a ratio

    Divide 240 in the ratio 3:3:2

    Answer: 90, 90 and 60
  5. 5. Statistics Mean

    Calculate the mean of: 7, 8, 23, 5, 45, 16

    Answer: 17.3

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