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Cornerstone · Grades 3–5 Keystones #1 24 November 2016 Skills week 1 of 7
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Five GCSE retrieval questions · 24 November 2016 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Calculate: 6⁄9 + 2⁄9

    Answer: 8⁄9
  2. 2. Algebra Two-step equations

    Solve: 2x - 12 = 10

    Answer: x = 11
  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 66 in the ratio 1:4:1

    Answer: 11, 44 and 11
  5. 5. Statistics Mean

    Calculate the mean of: 35, 21, 23, 29, 18, 9, 26, 45

    Answer: 25.75

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