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Cornerstone · Grades 3–5 Keystones #1 24 October 2010 Skills week 1 of 7
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Five GCSE retrieval questions · 24 October 2010 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Add: 1⁄3 + 2⁄8

    Answer: 7⁄12
  2. 2. Algebra Two-step equations

    Solve: 4x - 13 = 11

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

    Find the hypotenuse of a right triangle with sides 9cm and 12cm

    Answer: 15cm
  4. 4. Ratio Sharing in a ratio

    Share 60 in the ratio 1:3

    Answer: 15 and 45
  5. 5. Statistics Mean

    Calculate the mean of: 50, 50, 9, 49, 9, 6. Give your answer to 2 decimal places

    Answer: 28.83

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