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Cornerstone · Grades 3–5 Keystones #1 31 January 2021 Skills week 1 of 7
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Five GCSE retrieval questions · 31 January 2021 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Calculate: 7⁄12 + 1⁄12

    Answer: 2⁄3
  2. 2. Algebra Two-step equations

    Solve: 6x - 19 = 41

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

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

    Answer: 16.97cm
  4. 4. Ratio Sharing in a ratio

    Share 45 in the ratio 2:3

    Answer: 18 and 27
  5. 5. Statistics Mean

    Calculate the mean of: 26, 44, 23, 14, 32, 22, 35, 37

    Answer: 29.1

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