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Cornerstone · Grades 3–5 Keystones #1 10 October 2020 Skills week 1 of 7
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Keystones — Cornerstone

Five GCSE retrieval questions · 10 October 2020 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Calculate: 5⁄7 + 1⁄7

    Answer: 6⁄7
  2. 2. Algebra Two-step equations

    Solve: 2x - 17 = 7

    Answer: x = 12
  3. 3. Geometry Pythagoras — hypotenuse

    Calculate the hypotenuse when a = 8cm and b = 12cm

    Answer: 14.42cm
  4. 4. Ratio Sharing in a ratio

    Divide 182 in the ratio 2:1:4

    Answer: 52, 26 and 104
  5. 5. Statistics Mean

    Calculate the mean of: 38, 36, 45, 18, 6, 48, 43

    Answer: 33.4

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