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Cornerstone · Grades 3–5 Keystones #1 27 July 2017 Skills week 1 of 7
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Five GCSE retrieval questions · 27 July 2017 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Calculate: 5⁄9 + 1⁄9

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

    Solve: 2x - 18 = 0

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

    Find the hypotenuse of a right triangle with sides 20cm and 21cm

    Answer: 29cm
  4. 4. Ratio Sharing in a ratio

    Share 33 in the ratio 1:2

    Answer: 11 and 22
  5. 5. Statistics Mean

    Find the mean of: 10, 5, 13, 4, 18

    Answer: 10

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