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Cornerstone · Grades 3–5 Keystones #1 8 November 2013 Skills week 1 of 7
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Five GCSE retrieval questions · 8 November 2013 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Calculate: 2⁄7 + 1⁄7

    Answer: 3⁄7
  2. 2. Algebra Two-step equations

    Solve: 7x + 15 = 99

    Answer: x = 12
  3. 3. Geometry Pythagoras — hypotenuse

    Find the hypotenuse of a right triangle with sides 9cm and 12cm

    Answer: 15cm
  4. 4. Ratio Sharing in a ratio

    Share 60 in the ratio 3:1

    Answer: 45 and 15
  5. 5. Statistics Mean

    Calculate the mean of: 34, 31, 20, 9, 21, 33, 30, 14

    Answer: 24

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