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Cornerstone · Grades 3–5 Keystones #1 21 December 2020 Skills week 1 of 7
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Keystones — Cornerstone

Five GCSE retrieval questions · 21 December 2020 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Add: 5⁄6 + 3⁄7

    Answer: 53⁄42
  2. 2. Algebra Two-step equations

    Solve: 7x + 8 = 78

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

    Calculate the hypotenuse when a = 3cm and b = 8cm

    Answer: 8.54cm
  4. 4. Ratio Sharing in a ratio

    Share 36 in the ratio 1:3

    Answer: 9 and 27
  5. 5. Statistics Mean

    Calculate the mean of: 17, 9, 14, 43, 35, 6, 17, 35

    Answer: 22

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