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Cornerstone · Grades 3–5 Keystones #1 4 December 2012 Skills week 1 of 7
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Five GCSE retrieval questions · 4 December 2012 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Calculate: 6⁄10 + 3⁄10

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

    Solve: 6x + 12 = 42

    Answer: x = 5
  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 224 in the ratio 4:1:3

    Answer: 112, 28 and 84
  5. 5. Statistics Mean

    Calculate the mean of: 29, 36, 6, 25, 20, 16

    Answer: 22

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