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Cornerstone · Grades 3–5 Keystones #1 27 January 2016 Skills week 1 of 7
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Five GCSE retrieval questions · 27 January 2016 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Calculate: 9⁄12 + 1⁄12

    Answer: 5⁄6
  2. 2. Algebra Two-step equations

    Solve: 8x - 5 = 115

    Answer: x = 15
  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

    Divide 100 in the ratio 3:4:3

    Answer: 30, 40 and 30
  5. 5. Statistics Mean

    Calculate the mean of: 40, 12, 9, 27, 46, 42. Give your answer to 2 decimal places

    Answer: 29.33

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