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Cornerstone · Grades 3–5 Keystones #1 19 December 2020 Skills week 1 of 7
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Keystones — Cornerstone

Five GCSE retrieval questions · 19 December 2020 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Add: 1⁄3 + 6⁄8

    Answer: 13⁄12
  2. 2. Algebra Two-step equations

    Solve: 2x - 5 = 7

    Answer: x = 6
  3. 3. Geometry Pythagoras — hypotenuse

    Calculate the hypotenuse when a = 7cm and b = 10cm

    Answer: 12.21cm
  4. 4. Ratio Sharing in a ratio

    Share 42 in the ratio 1:2

    Answer: 14 and 28
  5. 5. Statistics Mean

    Calculate the mean of: 10, 6, 6, 33, 49, 27, 41, 17

    Answer: 23.6

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