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Cornerstone · Grades 3–5 Keystones #1 8 October 2010 Skills week 1 of 7
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Five GCSE retrieval questions · 8 October 2010 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Add: 2⁄3 + 2⁄7

    Answer: 20⁄21
  2. 2. Algebra Two-step equations

    Solve: 6x - 11 = 31

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

    Calculate the hypotenuse when a = 5cm and b = 15cm. Give your answer to 2 decimal places

    Answer: 15.81cm
  4. 4. Ratio Sharing in a ratio

    Divide 133 in the ratio 3:1:3

    Answer: 57, 19 and 57
  5. 5. Statistics Mean

    Find the mean of: 2, 14, 5

    Answer: 7

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