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Cornerstone · Grades 3–5 Keystones #1 13 February 2019 Skills week 1 of 7
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Five GCSE retrieval questions · 13 February 2019 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Calculate: 2⁄5 + 2⁄5

    Answer: 4⁄5
  2. 2. Algebra Two-step equations

    Solve: 5x + 7 = 57

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

    Calculate the hypotenuse when a = 7cm and b = 4cm

    Answer: 8.06cm
  4. 4. Ratio Sharing in a ratio

    Share 72 in the ratio 1:2

    Answer: 24 and 48
  5. 5. Statistics Mean

    Calculate the mean of: 27, 22, 25, 5, 17, 17, 16, 22

    Answer: 18.9

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