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Cornerstone · Grades 3–5 Keystones #1 24 February 2011 Skills week 1 of 7
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Five GCSE retrieval questions · 24 February 2011 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Add: 2⁄4 + 4⁄8

    Answer: 1⁄1
  2. 2. Algebra Two-step equations

    Solve: 4x + 5 = 25

    Answer: x = 5
  3. 3. Geometry Pythagoras — hypotenuse

    Calculate the hypotenuse when a = 7cm and b = 15cm. Give your answer to 2 decimal places

    Answer: 16.55cm
  4. 4. Ratio Sharing in a ratio

    Share 56 in the ratio 3:4

    Answer: 24 and 32
  5. 5. Statistics Mean

    Calculate the mean of: 38, 28, 15, 40, 16, 40, 26, 25

    Answer: 28.5

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