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Cornerstone · Grades 3–5 Keystones #1 13 September 2012 Skills week 1 of 7
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Five GCSE retrieval questions · 13 September 2012 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Calculate: 10⁄12 + 1⁄12

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

    Solve: 3x + 6 = 15

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

    Calculate the hypotenuse when a = 4cm and b = 15cm. Give your answer to 2 decimal places

    Answer: 15.52cm
  4. 4. Ratio Sharing in a ratio

    Share 76 in the ratio 1:3

    Answer: 19 and 57
  5. 5. Statistics Mean

    Calculate the mean of: 10, 18, 41, 45, 14, 7, 11. Give your answer to 2 decimal places

    Answer: 20.86

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