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Cornerstone · Grades 3–5 Keystones #1 29 September 2021 Skills week 1 of 7
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Five GCSE retrieval questions · 29 September 2021 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Add: 1⁄5 + 1⁄4

    Answer: 9⁄20
  2. 2. Algebra Two-step equations

    Solve: 8x - 20 = 92

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

    Calculate the hypotenuse when a = 8cm and b = 7cm

    Answer: 10.63cm
  4. 4. Ratio Sharing in a ratio

    Share 76 in the ratio 3:1

    Answer: 57 and 19
  5. 5. Statistics Mean

    Calculate the mean of: 34, 25, 6, 21, 38, 17, 42, 20

    Answer: 25.4

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