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Cornerstone · Grades 3–5 Keystones #1 26 November 2010 Skills week 1 of 7
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Five GCSE retrieval questions · 26 November 2010 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Add: 2⁄3 + 2⁄4

    Answer: 7⁄6
  2. 2. Algebra Two-step equations

    Solve: 2x - 12 = 18

    Answer: x = 15
  3. 3. Geometry Pythagoras — hypotenuse

    Find the hypotenuse of a right triangle with sides 8cm and 15cm

    Answer: 17cm
  4. 4. Ratio Sharing in a ratio

    Divide 133 in the ratio 3:3:1

    Answer: 57, 57 and 19
  5. 5. Statistics Mean

    Find the mean of: 6, 4, 9, 9, 22

    Answer: 10

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