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Cornerstone · Grades 3–5 Keystones #1 4 January 2011 Skills week 1 of 7
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Five GCSE retrieval questions · 4 January 2011 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Calculate: 10⁄12 + 1⁄12

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

    Solve: 6x + 10 = 70

    Answer: x = 10
  3. 3. Geometry Pythagoras — hypotenuse

    Calculate the hypotenuse when a = 7cm and b = 9cm. Give your answer to 2 decimal places

    Answer: 11.4cm
  4. 4. Ratio Sharing in a ratio

    Divide 168 in the ratio 2:2:3

    Answer: 48, 48 and 72
  5. 5. Statistics Mean

    Find the mean of: 22, 3, 2

    Answer: 9

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