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Cornerstone · Grades 3–5 Keystones #1 13 July 2013 Skills week 1 of 7
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Five GCSE retrieval questions · 13 July 2013 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Calculate: 8⁄12 + 1⁄12

    Answer: 3⁄4
  2. 2. Algebra Two-step equations

    Solve: 6x - 15 = 69

    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 208 in the ratio 3:1:4

    Answer: 78, 26 and 104
  5. 5. Statistics Mean

    Calculate the mean of: 34, 13, 29, 15, 11, 7, 47. Give your answer to 2 decimal places

    Answer: 22.29

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