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Cornerstone · Grades 3–5 Keystones #1 20 October 2011 Skills week 1 of 7
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Five GCSE retrieval questions · 20 October 2011 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Add: 1⁄3 + 1⁄4

    Answer: 7⁄12
  2. 2. Algebra Two-step equations

    Solve: 6x - 14 = 70

    Answer: x = 14
  3. 3. Geometry Pythagoras — hypotenuse

    Find the hypotenuse of a right triangle with sides 20cm and 21cm

    Answer: 29cm
  4. 4. Ratio Sharing in a ratio

    Divide 96 in the ratio 1:3:2

    Answer: 16, 48 and 32
  5. 5. Statistics Mean

    Find the mean of: 12, 6, 3, 20, 19

    Answer: 12

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