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Cornerstone · Grades 3–5 Keystones #1 21 November 2011 Skills week 1 of 7
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Five GCSE retrieval questions · 21 November 2011 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Calculate: 3⁄6 + 2⁄6

    Answer: 5⁄6
  2. 2. Algebra Two-step equations

    Solve: 3x - 6 = 12

    Answer: x = 6
  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 70 in the ratio 1:4

    Answer: 14 and 56
  5. 5. Statistics Mean

    Calculate the mean of: 34, 19, 36, 6, 41, 42, 20. Give your answer to 2 decimal places

    Answer: 28.29

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