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Cornerstone · Grades 3–5 Keystones #1 22 July 2011 Skills week 1 of 7
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Five GCSE retrieval questions · 22 July 2011 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Add: 6⁄7 + 2⁄3

    Answer: 32⁄21
  2. 2. Algebra Two-step equations

    Solve: 2x - 20 = -10

    Answer: x = 5
  3. 3. Geometry Pythagoras — hypotenuse

    Find the hypotenuse of a right triangle with sides 6cm and 8cm

    Answer: 10cm
  4. 4. Ratio Sharing in a ratio

    Divide 126 in the ratio 1:4:2

    Answer: 18, 72 and 36
  5. 5. Statistics Mean

    Find the mean of: 11, 19, 12, 6, 2

    Answer: 10

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