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Cornerstone · Grades 3–5 Keystones #1 12 October 2015 Skills week 1 of 7
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Five GCSE retrieval questions · 12 October 2015 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Calculate: 1⁄12 + 10⁄12

    Answer: 11⁄12
  2. 2. Algebra Two-step equations

    Solve: 5x + 12 = 57

    Answer: x = 9
  3. 3. Geometry Pythagoras — hypotenuse

    Find the hypotenuse of a right triangle with sides 9cm and 40cm

    Answer: 41cm
  4. 4. Ratio Sharing in a ratio

    Divide 119 in the ratio 2:1:4

    Answer: 34, 17 and 68
  5. 5. Statistics Mean

    Calculate the mean of: 5, 32, 12, 34, 6, 34

    Answer: 20.5

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