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Cornerstone · Grades 3–5 Keystones #1 10 February 2011 Skills week 1 of 7
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Five GCSE retrieval questions · 10 February 2011 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Calculate: 4⁄7 + 1⁄7

    Answer: 5⁄7
  2. 2. Algebra Two-step equations

    Solve: 2x - 17 = -9

    Answer: x = 4
  3. 3. Geometry Pythagoras — hypotenuse

    Calculate the hypotenuse when a = 6cm and b = 5cm. Give your answer to 2 decimal places

    Answer: 7.81cm
  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: 25, 23, 9, 8, 32, 26

    Answer: 20.5

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