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Cornerstone · Grades 3–5 Keystones #1 27 November 2021 Skills week 1 of 7
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Five GCSE retrieval questions · 27 November 2021 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Add: 1⁄5 + 1⁄6

    Answer: 11⁄30
  2. 2. Algebra Two-step equations

    Solve: 7x - 20 = 29

    Answer: x = 7
  3. 3. Geometry Pythagoras — hypotenuse

    Calculate the hypotenuse when a = 12cm and b = 4cm

    Answer: 12.65cm
  4. 4. Ratio Sharing in a ratio

    Share 72 in the ratio 3:1

    Answer: 54 and 18
  5. 5. Statistics Mean

    Calculate the mean of: 26, 28, 35, 5, 40, 18, 22

    Answer: 24.9

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