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Cornerstone · Grades 3–5 Keystones #1 29 September 2012 Skills week 1 of 7
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Five GCSE retrieval questions · 29 September 2012 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Calculate: 4⁄11 + 5⁄11

    Answer: 9⁄11
  2. 2. Algebra Two-step equations

    Solve: 6x + 6 = 72

    Answer: x = 11
  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 35 in the ratio 4:1

    Answer: 28 and 7
  5. 5. Statistics Mean

    Find the mean of: 25, 7, 6, 17, 10

    Answer: 13

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