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Cornerstone · Grades 3–5 Keystones #1 25 December 2017 Skills week 1 of 7
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Five GCSE retrieval questions · 25 December 2017 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Calculate: 9⁄12 + 1⁄12

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

    Solve: 2x + 14 = 36

    Answer: x = 11
  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

    Share 66 in the ratio 1:2

    Answer: 22 and 44
  5. 5. Statistics Mean

    Find the mean of: 19, 20, 19, 14, 3

    Answer: 15

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