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Cornerstone · Grades 3–5 Keystones #1 14 September 2012 Skills week 1 of 7
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Five GCSE retrieval questions · 14 September 2012 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Calculate: 5⁄10 + 4⁄10

    Answer: 9⁄10
  2. 2. Algebra Two-step equations

    Solve: 6x + 5 = 29

    Answer: x = 4
  3. 3. Geometry Pythagoras — hypotenuse

    Find the hypotenuse of a right triangle with sides 5cm and 12cm

    Answer: 13cm
  4. 4. Ratio Sharing in a ratio

    Divide 270 in the ratio 2:2:1

    Answer: 108, 108 and 54
  5. 5. Statistics Mean

    Find the mean of: 12, 18, 8, 9, 18

    Answer: 13

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