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

  1. 1. Number Adding fractions

    Add: 5⁄6 + 6⁄7

    Answer: 71⁄42
  2. 2. Algebra Two-step equations

    Solve: 3x + 15 = 33

    Answer: x = 6
  3. 3. Geometry Pythagoras — hypotenuse

    Calculate the hypotenuse when a = 10cm and b = 14cm. Give your answer to 2 decimal places

    Answer: 17.2cm
  4. 4. Ratio Sharing in a ratio

    Divide 160 in the ratio 4:1:3

    Answer: 80, 20 and 60
  5. 5. Statistics Mean

    Find the mean of: 12, 11, 16, 9

    Answer: 12

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