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Cornerstone · Grades 3–5 Keystones #1 14 October 2017 Skills week 1 of 7
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Five GCSE retrieval questions · 14 October 2017 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Add: 2⁄6 + 1⁄3

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

    Solve: 3x - 6 = 21

    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 200 in the ratio 4:3:3

    Answer: 80, 60 and 60
  5. 5. Statistics Mean

    Find the mean of: 3, 18, 7, 4

    Answer: 8

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