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

Five GCSE retrieval questions · 3 January 2021 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Calculate: 3⁄9 + 4⁄9

    Answer: 7⁄9
  2. 2. Algebra Two-step equations

    Solve: 2x - 14 = 6

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

    Calculate the hypotenuse when a = 7cm and b = 9cm

    Answer: 11.4cm
  4. 4. Ratio Sharing in a ratio

    Divide 168 in the ratio 1:2:3

    Answer: 28, 56 and 84
  5. 5. Statistics Mean

    Calculate the mean of: 21, 14, 13, 31, 33, 26, 39

    Answer: 25.3

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