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Cornerstone · Grades 3–5 Keystones #1 23 September 2019 Skills week 1 of 7
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Five GCSE retrieval questions · 23 September 2019 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Calculate: 1⁄6 + 2⁄6

    Answer: 1⁄2
  2. 2. Algebra Two-step equations

    Solve: 2x + 13 = 35

    Answer: x = 11
  3. 3. Geometry Pythagoras — hypotenuse

    Calculate the hypotenuse when a = 4cm and b = 11cm

    Answer: 11.7cm
  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: 30, 49, 9, 40, 11, 7, 16, 9

    Answer: 21.4

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