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Cornerstone · Grades 3–5 Keystones #1 30 August 2010 Skills week 1 of 7
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Five GCSE retrieval questions · 30 August 2010 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Calculate: 2⁄6 + 1⁄6

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

    Solve: 7x - 8 = 34

    Answer: x = 6
  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 28 in the ratio 3:1

    Answer: 21 and 7
  5. 5. Statistics Mean

    Calculate the mean of: 8, 33, 43, 23, 22, 46, 14, 39

    Answer: 28.5

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