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Cornerstone · Grades 3–5 Keystones #1 12 November 2010 Skills week 1 of 7
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Five GCSE retrieval questions · 12 November 2010 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Calculate: 3⁄6 + 1⁄6

    Answer: 2⁄3
  2. 2. Algebra Two-step equations

    Solve: 3x + 6 = 36

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

    Calculate the hypotenuse when a = 9cm and b = 4cm. Give your answer to 2 decimal places

    Answer: 9.85cm
  4. 4. Ratio Sharing in a ratio

    Divide 174 in the ratio 1:3:2

    Answer: 29, 87 and 58
  5. 5. Statistics Mean

    Find the mean of: 4, 20, 15, 16, 20

    Answer: 15

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