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Cornerstone · Grades 3–5 Keystones #1 10 November 2012 Skills week 1 of 7
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Five GCSE retrieval questions · 10 November 2012 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Calculate: 2⁄5 + 2⁄5

    Answer: 4⁄5
  2. 2. Algebra Two-step equations

    Solve: 2x - 15 = 7

    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 66 in the ratio 1:2

    Answer: 22 and 44
  5. 5. Statistics Mean

    Find the mean of: 7, 13, 12, 4

    Answer: 9

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