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Cornerstone · Grades 3–5 Keystones #1 26 January 2015 Skills week 1 of 7
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Five GCSE retrieval questions · 26 January 2015 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Calculate: 5⁄11 + 3⁄11

    Answer: 8⁄11
  2. 2. Algebra Two-step equations

    Solve: 6x + 7 = 43

    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 55 in the ratio 3:2

    Answer: 33 and 22
  5. 5. Statistics Mean

    Calculate the mean of: 20, 40, 21, 5, 35, 42, 46. Give your answer to 2 decimal places

    Answer: 29.86

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