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Cornerstone · Grades 3–5 Keystones #1 26 October 2011 Skills week 1 of 7
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Five GCSE retrieval questions · 26 October 2011 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Calculate: 5⁄9 + 3⁄9

    Answer: 8⁄9
  2. 2. Algebra Two-step equations

    Solve: 3x + 7 = 19

    Answer: x = 4
  3. 3. Geometry Pythagoras — hypotenuse

    Find the hypotenuse of a right triangle with sides 9cm and 12cm

    Answer: 15cm
  4. 4. Ratio Sharing in a ratio

    Share 80 in the ratio 3:1

    Answer: 60 and 20
  5. 5. Statistics Mean

    Find the mean of: 14, 17, 14

    Answer: 15

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