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Cornerstone · Grades 3–5 Keystones #1 15 February 2021 Skills week 1 of 7
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Five GCSE retrieval questions · 15 February 2021 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Calculate: 3⁄9 + 3⁄9

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

    Solve: 6x - 13 = 77

    Answer: x = 15
  3. 3. Geometry Pythagoras — hypotenuse

    Calculate the hypotenuse when a = 6cm and b = 11cm

    Answer: 12.53cm
  4. 4. Ratio Sharing in a ratio

    Share 65 in the ratio 3:2

    Answer: 39 and 26
  5. 5. Statistics Mean

    Calculate the mean of: 24, 18, 41, 31, 13, 8, 37, 42

    Answer: 26.8

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