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Cornerstone · Grades 3–5 Keystones #1 28 January 2021 Skills week 1 of 7
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Five GCSE retrieval questions · 28 January 2021 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Calculate: 4⁄12 + 4⁄12

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

    Solve: 7x - 10 = 18

    Answer: x = 4
  3. 3. Geometry Pythagoras — hypotenuse

    Find the hypotenuse of a right triangle with sides 15cm and 20cm

    Answer: 25cm
  4. 4. Ratio Sharing in a ratio

    Share 44 in the ratio 1:3

    Answer: 11 and 33
  5. 5. Statistics Mean

    Calculate the mean of: 26, 10, 48, 46, 47, 31

    Answer: 34.7

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