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Cornerstone · Grades 3–5 Keystones #1 10 February 2018 Skills week 1 of 7
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Five GCSE retrieval questions · 10 February 2018 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Calculate: 7⁄11 + 2⁄11

    Answer: 9⁄11
  2. 2. Algebra Two-step equations

    Solve: 5x + 5 = 55

    Answer: x = 10
  3. 3. Geometry Pythagoras — hypotenuse

    Find the hypotenuse of a right triangle with sides 9cm and 12cm

    Answer: 15cm
  4. 4. Ratio Sharing in a ratio

    Share 70 in the ratio 3:4

    Answer: 30 and 40
  5. 5. Statistics Mean

    Calculate the mean of: 34, 14, 9, 5, 46, 39

    Answer: 24.5

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