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

  1. 1. Number Adding fractions

    Calculate: 2⁄7 + 2⁄7

    Answer: 4⁄7
  2. 2. Algebra Two-step equations

    Solve: 6x - 18 = 30

    Answer: x = 8
  3. 3. Geometry Pythagoras — hypotenuse

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

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

    Divide 90 in the ratio 4:4:1

    Answer: 40, 40 and 10
  5. 5. Statistics Mean

    Find the mean of: 14, 19, 6, 6, 19

    Answer: 12.8

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