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Cornerstone · Grades 3–5 Keystones #1 12 September 2010 Skills week 1 of 7
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Keystones — Cornerstone

Five GCSE retrieval questions · 12 September 2010 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Add: 2⁄6 + 5⁄7

    Answer: 22⁄21
  2. 2. Algebra Two-step equations

    Solve: 5x - 11 = 29

    Answer: x = 8
  3. 3. Geometry Pythagoras — hypotenuse

    Find the hypotenuse of a right triangle with sides 3cm and 4cm

    Answer: 5cm
  4. 4. Ratio Sharing in a ratio

    Divide 189 in the ratio 1:4:2

    Answer: 27, 108 and 54
  5. 5. Statistics Mean

    Calculate the mean of: 35, 39, 47, 14, 33, 22, 22, 10

    Answer: 27.75

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