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Cornerstone · Grades 3–5 Keystones #1 24 May 2011 Skills week 1 of 7
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Five GCSE retrieval questions · 24 May 2011 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Calculate: 1⁄8 + 2⁄8

    Answer: 3⁄8
  2. 2. Algebra Two-step equations

    Solve: 3x - 18 = 24

    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

    Share 57 in the ratio 1:2

    Answer: 19 and 38
  5. 5. Statistics Mean

    Find the mean of: 11, 2, 16, 11, 20

    Answer: 12

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