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Cornerstone · Grades 3–5 Keystones #1 13 January 2021 Skills week 1 of 7
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Keystones — Cornerstone

Five GCSE retrieval questions · 13 January 2021 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Add: 1⁄3 + 5⁄8

    Answer: 23⁄24
  2. 2. Algebra Two-step equations

    Solve: 3x + 4 = 37

    Answer: x = 11
  3. 3. Geometry Pythagoras — hypotenuse

    Calculate the hypotenuse when a = 10cm and b = 15cm

    Answer: 18.03cm
  4. 4. Ratio Sharing in a ratio

    Share 45 in the ratio 2:3

    Answer: 18 and 27
  5. 5. Statistics Mean

    Calculate the mean of: 32, 33, 29, 44, 10, 47

    Answer: 32.5

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