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Cornerstone · Grades 3–5 Keystones #1 12 December 2019 Skills week 1 of 7
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Five GCSE retrieval questions · 12 December 2019 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Calculate: 1⁄9 + 2⁄9

    Answer: 1⁄3
  2. 2. Algebra Two-step equations

    Solve: 6x - 20 = 34

    Answer: x = 9
  3. 3. Geometry Pythagoras — hypotenuse

    Calculate the hypotenuse when a = 10cm and b = 4cm

    Answer: 10.77cm
  4. 4. Ratio Sharing in a ratio

    Share 33 in the ratio 1:2

    Answer: 11 and 22
  5. 5. Statistics Mean

    Find the mean of: 11, 13, 11

    Answer: 11.666666666667

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