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

Five GCSE retrieval questions · 1 December 2020 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Calculate: 8⁄11 + 2⁄11

    Answer: 10⁄11
  2. 2. Algebra Two-step equations

    Solve: 5x + 11 = 26

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

    Calculate the hypotenuse when a = 12cm and b = 6cm

    Answer: 13.42cm
  4. 4. Ratio Sharing in a ratio

    Share 65 in the ratio 1:4

    Answer: 13 and 52
  5. 5. Statistics Mean

    Find the mean of: 17, 19, 13, 5, 4

    Answer: 11.6

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