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Cornerstone · Grades 3–5 Keystones #1 28 November 2011 Skills week 1 of 7
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Five GCSE retrieval questions · 28 November 2011 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Add: 6⁄7 + 1⁄5

    Answer: 37⁄35
  2. 2. Algebra Two-step equations

    Solve: 5x + 5 = 40

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

    Calculate the hypotenuse when a = 8cm and b = 7cm. Give your answer to 2 decimal places

    Answer: 10.63cm
  4. 4. Ratio Sharing in a ratio

    Divide 96 in the ratio 4:1:3

    Answer: 48, 12 and 36
  5. 5. Statistics Mean

    Calculate the mean of: 16, 39, 38, 13, 46, 11, 6, 31

    Answer: 25

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