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Cornerstone · Grades 3–5 Keystones #1 25 February 2011 Skills week 1 of 7
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Five GCSE retrieval questions · 25 February 2011 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Calculate: 3⁄9 + 3⁄9

    Answer: 2⁄3
  2. 2. Algebra Two-step equations

    Solve: 5x - 9 = 36

    Answer: x = 9
  3. 3. Geometry Pythagoras — hypotenuse

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

    Answer: 11.31cm
  4. 4. Ratio Sharing in a ratio

    Share 30 in the ratio 1:2

    Answer: 10 and 20
  5. 5. Statistics Mean

    Find the mean of: 9, 16, 2, 20, 3

    Answer: 10

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