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Cornerstone · Grades 3–5 Keystones #1 19 October 2011 Skills week 1 of 7
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Five GCSE retrieval questions · 19 October 2011 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Calculate: 1⁄9 + 6⁄9

    Answer: 7⁄9
  2. 2. Algebra Two-step equations

    Solve: 7x - 5 = 93

    Answer: x = 14
  3. 3. Geometry Pythagoras — hypotenuse

    Find the hypotenuse of a right triangle with sides 3cm and 4cm

    Answer: 5cm
  4. 4. Ratio Sharing in a ratio

    Divide 138 in the ratio 4:1:1

    Answer: 92, 23 and 23
  5. 5. Statistics Mean

    Calculate the mean of: 31, 8, 6, 39, 18, 17. Give your answer to 2 decimal places

    Answer: 19.83

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