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Cornerstone · Grades 3–5 Keystones #1 22 July 2010 Skills week 1 of 7
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Five GCSE retrieval questions · 22 July 2010 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Calculate: 5⁄12 + 1⁄12

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

    Solve: 5x - 18 = 22

    Answer: x = 8
  3. 3. Geometry Pythagoras — hypotenuse

    Find the hypotenuse of a right triangle with sides 12cm and 35cm

    Answer: 37cm
  4. 4. Ratio Sharing in a ratio

    Divide 66 in the ratio 1:4:1

    Answer: 11, 44 and 11
  5. 5. Statistics Mean

    Find the mean of: 16, 18, 10, 6, 10

    Answer: 12

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