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Cornerstone · Grades 3–5 Keystones #1 26 September 2011 Skills week 1 of 7
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Five GCSE retrieval questions · 26 September 2011 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Add: 2⁄5 + 2⁄7

    Answer: 24⁄35
  2. 2. Algebra Two-step equations

    Solve: 2x + 4 = 18

    Answer: x = 7
  3. 3. Geometry Pythagoras — hypotenuse

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

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

    Divide 112 in the ratio 2:1:4

    Answer: 32, 16 and 64
  5. 5. Statistics Mean

    Calculate the mean of: 47, 9, 33, 47, 32, 7, 34, 43

    Answer: 31.5

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