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Cornerstone · Grades 3–5 Keystones #1 11 July 2021 Skills week 1 of 7
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Keystones — Cornerstone

Five GCSE retrieval questions · 11 July 2021 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Calculate: 2⁄7 + 2⁄7

    Answer: 4⁄7
  2. 2. Algebra Two-step equations

    Solve: 3x - 15 = -3

    Answer: x = 4
  3. 3. Geometry Pythagoras — hypotenuse

    Calculate the hypotenuse when a = 10cm and b = 6cm

    Answer: 11.66cm
  4. 4. Ratio Sharing in a ratio

    Divide 162 in the ratio 1:4:1

    Answer: 27, 108 and 27
  5. 5. Statistics Mean

    Calculate the mean of: 25, 37, 48, 7, 5, 7, 26, 19

    Answer: 21.8

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