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Cornerstone · Grades 3–5 Keystones #1 25 July 2011 Skills week 1 of 7
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Keystones — Cornerstone

Five GCSE retrieval questions · 25 July 2011 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Add: 2⁄3 + 1⁄4

    Answer: 11⁄12
  2. 2. Algebra Two-step equations

    Solve: 6x - 12 = 42

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

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

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

    Share 51 in the ratio 1:2

    Answer: 17 and 34
  5. 5. Statistics Mean

    Calculate the mean of: 28, 44, 13, 17, 15, 17, 13

    Answer: 21

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