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Cornerstone · Grades 3–5 Keystones #1 9 November 2012 Skills week 1 of 7
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Five GCSE retrieval questions · 9 November 2012 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Calculate: 5⁄12 + 1⁄12

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

    Solve: 3x - 20 = 16

    Answer: x = 12
  3. 3. Geometry Pythagoras — hypotenuse

    Calculate the hypotenuse when a = 9cm and b = 12cm

    Answer: 15cm
  4. 4. Ratio Sharing in a ratio

    Share 54 in the ratio 2:1

    Answer: 36 and 18
  5. 5. Statistics Mean

    Find the mean of: 16, 5, 12

    Answer: 11

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