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Cornerstone · Grades 3–5 Keystones #1 7 February 2015 Skills week 1 of 7
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Five GCSE retrieval questions · 7 February 2015 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Calculate: 9⁄11 + 1⁄11

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

    Solve: 2x - 8 = 18

    Answer: x = 13
  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 175 in the ratio 3:3:1

    Answer: 75, 75 and 25
  5. 5. Statistics Mean

    Calculate the mean of: 40, 10, 23, 25, 36, 13

    Answer: 24.5

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