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Cornerstone · Grades 3–5 Keystones #1 8 December 2011 Skills week 1 of 7
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Five GCSE retrieval questions · 8 December 2011 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Calculate: 5⁄7 + 1⁄7

    Answer: 6⁄7
  2. 2. Algebra Two-step equations

    Solve: 7x + 10 = 87

    Answer: x = 11
  3. 3. Geometry Pythagoras — hypotenuse

    Calculate the hypotenuse when a = 5cm and b = 4cm. Give your answer to 2 decimal places

    Answer: 6.4cm
  4. 4. Ratio Sharing in a ratio

    Share 25 in the ratio 3:2

    Answer: 15 and 10
  5. 5. Statistics Mean

    Find the mean of: 18, 12, 2, 5, 13

    Answer: 10

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