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Cornerstone · Grades 3–5 Keystones #1 14 September 2015 Skills week 1 of 7
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Five GCSE retrieval questions · 14 September 2015 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Calculate: 6⁄11 + 2⁄11

    Answer: 8⁄11
  2. 2. Algebra Two-step equations

    Solve: 4x - 18 = 10

    Answer: x = 7
  3. 3. Geometry Pythagoras — hypotenuse

    Find the hypotenuse of a right triangle with sides 15cm and 20cm

    Answer: 25cm
  4. 4. Ratio Sharing in a ratio

    Divide 77 in the ratio 2:2:3

    Answer: 22, 22 and 33
  5. 5. Statistics Mean

    Find the mean of: 10, 13, 8, 13

    Answer: 11

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