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Cornerstone · Grades 3–5 Keystones #1 11 February 2020 Skills week 1 of 7
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Five GCSE retrieval questions · 11 February 2020 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Calculate: 2⁄11 + 6⁄11

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

    Solve: 5x - 17 = 8

    Answer: x = 5
  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 156 in the ratio 1:3:2

    Answer: 26, 78 and 52
  5. 5. Statistics Mean

    Find the mean of: 10, 19, 3

    Answer: 10.666666666667

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