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Cornerstone · Grades 3–5 Keystones #1 21 August 2010 Skills week 1 of 7
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Five GCSE retrieval questions · 21 August 2010 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Calculate: 1⁄10 + 3⁄10

    Answer: 2⁄5
  2. 2. Algebra Two-step equations

    Solve: 6x - 17 = 13

    Answer: x = 5
  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 133 in the ratio 1:4:2

    Answer: 19, 76 and 38
  5. 5. Statistics Mean

    Find the mean of: 16, 20, 9, 11

    Answer: 14

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