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Cornerstone · Grades 3–5 Keystones #1 9 August 2014 Skills week 1 of 7
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Five GCSE retrieval questions · 9 August 2014 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Calculate: 8⁄12 + 1⁄12

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

    Solve: 2x + 7 = 15

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

    Find the hypotenuse of a right triangle with sides 5cm and 12cm

    Answer: 13cm
  4. 4. Ratio Sharing in a ratio

    Divide 60 in the ratio 1:1:4

    Answer: 10, 10 and 40
  5. 5. Statistics Mean

    Calculate the mean of: 36, 23, 15, 26, 27, 46, 36, 10. Give your answer to 2 decimal places

    Answer: 27.38

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