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Cornerstone · Grades 3–5 Keystones #1 28 February 2021 Skills week 1 of 7
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Five GCSE retrieval questions · 28 February 2021 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Calculate: 5⁄8 + 2⁄8

    Answer: 7⁄8
  2. 2. Algebra Two-step equations

    Solve: 7x - 20 = 50

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

    Calculate the hypotenuse when a = 7cm and b = 11cm

    Answer: 13.04cm
  4. 4. Ratio Sharing in a ratio

    Divide 55 in the ratio 2:1:2

    Answer: 22, 11 and 22
  5. 5. Statistics Mean

    Calculate the mean of: 36, 25, 18, 38, 36, 13

    Answer: 27.7

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