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Cornerstone · Grades 3–5 Keystones #1 30 June 2021 Skills week 1 of 7
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Five GCSE retrieval questions · 30 June 2021 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Calculate: 2⁄5 + 1⁄5

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

    Solve: 5x - 5 = 60

    Answer: x = 13
  3. 3. Geometry Pythagoras — hypotenuse

    Find the hypotenuse of a right triangle with sides 20cm and 21cm

    Answer: 29cm
  4. 4. Ratio Sharing in a ratio

    Share 36 in the ratio 2:1

    Answer: 24 and 12
  5. 5. Statistics Mean

    Calculate the mean of: 40, 23, 24, 23, 35, 42

    Answer: 31.2

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