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Cornerstone · Grades 3–5 Keystones #1 29 January 2011 Skills week 1 of 7
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Five GCSE retrieval questions · 29 January 2011 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Add: 1⁄3 + 1⁄7

    Answer: 10⁄21
  2. 2. Algebra Two-step equations

    Solve: 8x - 9 = 95

    Answer: x = 13
  3. 3. Geometry Pythagoras — hypotenuse

    Calculate the hypotenuse when a = 9cm and b = 15cm. Give your answer to 2 decimal places

    Answer: 17.49cm
  4. 4. Ratio Sharing in a ratio

    Divide 135 in the ratio 4:1:4

    Answer: 60, 15 and 60
  5. 5. Statistics Mean

    Find the mean of: 4, 1, 16

    Answer: 7

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