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

  1. 1. Number Adding fractions

    Calculate: 5⁄10 + 1⁄10

    Answer: 3⁄5
  2. 2. Algebra Two-step equations

    Solve: 4x + 5 = 41

    Answer: x = 9
  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 27 in the ratio 1:2

    Answer: 9 and 18
  5. 5. Statistics Mean

    Calculate the mean of: 18, 24, 24, 6, 11, 14, 24, 48

    Answer: 21.1

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