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Cornerstone · Grades 3–5 Keystones #1 28 July 2010 Skills week 1 of 7
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Five GCSE retrieval questions · 28 July 2010 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Calculate: 4⁄7 + 2⁄7

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

    Solve: 3x + 8 = 41

    Answer: x = 11
  3. 3. Geometry Pythagoras — hypotenuse

    Find the hypotenuse of a right triangle with sides 15cm and 20cm

    Answer: 25cm
  4. 4. Ratio Sharing in a ratio

    Share 57 in the ratio 2:1

    Answer: 38 and 19
  5. 5. Statistics Mean

    Find the mean of: 6, 14, 10, 14

    Answer: 11

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