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

  1. 1. Number Adding fractions

    Calculate: 7⁄12 + 2⁄12

    Answer: 3⁄4
  2. 2. Algebra Two-step equations

    Solve: 3x - 10 = 20

    Answer: x = 10
  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

    Share 30 in the ratio 1:2

    Answer: 10 and 20
  5. 5. Statistics Mean

    Calculate the mean of: 33, 9, 29, 16, 19, 38, 16, 30

    Answer: 23.75

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