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Cornerstone · Grades 3–5 Keystones #1 16 November 2011 Skills week 1 of 7
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Five GCSE retrieval questions · 16 November 2011 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Calculate: 3⁄9 + 1⁄9

    Answer: 4⁄9
  2. 2. Algebra Two-step equations

    Solve: 4x + 13 = 53

    Answer: x = 10
  3. 3. Geometry Pythagoras — hypotenuse

    Find the hypotenuse of a right triangle with sides 7cm and 24cm

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

    Share 90 in the ratio 4:1

    Answer: 72 and 18
  5. 5. Statistics Mean

    Calculate the mean of: 34, 33, 22, 12, 21, 49

    Answer: 28.5

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