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Cornerstone · Grades 3–5 Keystones #1 21 February 2020 Skills week 1 of 7
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Five GCSE retrieval questions · 21 February 2020 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Calculate: 8⁄11 + 2⁄11

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

    Solve: 3x + 9 = 39

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

    Find the hypotenuse of a right triangle with sides 12cm and 35cm

    Answer: 37cm
  4. 4. Ratio Sharing in a ratio

    Share 50 in the ratio 3:2

    Answer: 30 and 20
  5. 5. Statistics Mean

    Calculate the mean of: 39, 13, 49, 30, 24, 11, 12

    Answer: 25.4

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