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Cornerstone · Grades 3–5 Keystones #1 13 November 2016 Skills week 1 of 7
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Five GCSE retrieval questions · 13 November 2016 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Calculate: 8⁄11 + 2⁄11

    Answer: 10⁄11
  2. 2. Algebra Two-step equations

    Solve: 7x + 7 = 35

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

    Find the hypotenuse of a right triangle with sides 15cm and 20cm

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

    Divide 280 in the ratio 2:2:1

    Answer: 112, 112 and 56
  5. 5. Statistics Mean

    Calculate the mean of: 38, 41, 13, 24, 13, 35, 36. Give your answer to 2 decimal places

    Answer: 28.57

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