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Cornerstone · Grades 3–5 Keystones #1 15 August 2011 Skills week 1 of 7
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Five GCSE retrieval questions · 15 August 2011 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Calculate: 1⁄8 + 1⁄8

    Answer: 1⁄4
  2. 2. Algebra Two-step equations

    Solve: 2x + 12 = 26

    Answer: x = 7
  3. 3. Geometry Pythagoras — hypotenuse

    Find the hypotenuse of a right triangle with sides 9cm and 40cm

    Answer: 41cm
  4. 4. Ratio Sharing in a ratio

    Divide 80 in the ratio 1:2:1

    Answer: 20, 40 and 20
  5. 5. Statistics Mean

    Find the mean of: 2, 7, 15

    Answer: 8

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