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Cornerstone · Grades 3–5 Keystones #1 9 October 2020 Skills week 1 of 7
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Five GCSE retrieval questions · 9 October 2020 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Calculate: 4⁄9 + 1⁄9

    Answer: 5⁄9
  2. 2. Algebra Two-step equations

    Solve: 5x - 14 = 16

    Answer: x = 6
  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 84 in the ratio 2:3:1

    Answer: 28, 42 and 14
  5. 5. Statistics Mean

    Calculate the mean of: 9, 9, 26, 6, 41, 19, 24

    Answer: 19.1

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