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Cornerstone · Grades 3–5 Keystones #1 31 August 2014 Skills week 1 of 7
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Keystones — Cornerstone

Five GCSE retrieval questions · 31 August 2014 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Calculate: 2⁄7 + 3⁄7

    Answer: 5⁄7
  2. 2. Algebra Two-step equations

    Solve: 4x - 18 = 10

    Answer: x = 7
  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 216 in the ratio 1:1:2

    Answer: 54, 54 and 108
  5. 5. Statistics Mean

    Calculate the mean of: 22, 18, 10, 41, 31, 22, 35, 49

    Answer: 28.5

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