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Cornerstone · Grades 3–5 Keystones #1 24 February 2019 Skills week 1 of 7
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Five GCSE retrieval questions · 24 February 2019 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Calculate: 10⁄12 + 1⁄12

    Answer: 11⁄12
  2. 2. Algebra Two-step equations

    Solve: 6x - 12 = 42

    Answer: x = 9
  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 28 in the ratio 1:3

    Answer: 7 and 21
  5. 5. Statistics Mean

    Calculate the mean of: 32, 33, 27, 44, 28, 41, 18, 23

    Answer: 30.8

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