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Cornerstone · Grades 3–5 Keystones #1 24 February 2020 Skills week 1 of 7
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Five GCSE retrieval questions · 24 February 2020 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Calculate: 9⁄11 + 1⁄11

    Answer: 10⁄11
  2. 2. Algebra Two-step equations

    Solve: 6x - 19 = 17

    Answer: x = 6
  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 150 in the ratio 2:2:1

    Answer: 60, 60 and 30
  5. 5. Statistics Mean

    Calculate the mean of: 49, 12, 34, 13, 12, 12, 36, 25

    Answer: 24.1

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