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Cornerstone · Grades 3–5 Keystones #1 9 April 2012 Skills week 1 of 7
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Keystones — Cornerstone

Five GCSE retrieval questions · 9 April 2012 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Calculate: 9⁄12 + 2⁄12

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

    Solve: 5x - 17 = 58

    Answer: x = 15
  3. 3. Geometry Pythagoras — hypotenuse

    Calculate the hypotenuse when a = 3cm and b = 4cm

    Answer: 5cm
  4. 4. Ratio Sharing in a ratio

    Share 80 in the ratio 1:4

    Answer: 16 and 64
  5. 5. Statistics Mean

    Calculate the mean of: 20, 35, 21, 10, 31, 10, 18, 5

    Answer: 18.75

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