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Cornerstone · Grades 3–5 Keystones #1 9 September 2021 Skills week 1 of 7
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Keystones — Cornerstone

Five GCSE retrieval questions · 9 September 2021 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Calculate: 3⁄9 + 1⁄9

    Answer: 4⁄9
  2. 2. Algebra Two-step equations

    Solve: 4x - 20 = 28

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

    Calculate the hypotenuse when a = 3cm and b = 15cm

    Answer: 15.3cm
  4. 4. Ratio Sharing in a ratio

    Share 84 in the ratio 4:3

    Answer: 48 and 36
  5. 5. Statistics Mean

    Find the mean of: 6, 18, 13, 20, 12

    Answer: 13.8

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