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Cornerstone · Grades 3–5 Keystones #1 25 September 2021 Skills week 1 of 7
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Five GCSE retrieval questions · 25 September 2021 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Calculate: 8⁄10 + 1⁄10

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

    Solve: 6x - 13 = 71

    Answer: x = 14
  3. 3. Geometry Pythagoras — hypotenuse

    Find the hypotenuse of a right triangle with sides 12cm and 35cm

    Answer: 37cm
  4. 4. Ratio Sharing in a ratio

    Share 52 in the ratio 3:1

    Answer: 39 and 13
  5. 5. Statistics Mean

    Calculate the mean of: 32, 8, 9, 33, 16, 31, 25

    Answer: 22

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