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Cornerstone · Grades 3–5 Keystones #1 20 December 2021 Skills week 1 of 7
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Five GCSE retrieval questions · 20 December 2021 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Add: 5⁄8 + 2⁄6

    Answer: 23⁄24
  2. 2. Algebra Two-step equations

    Solve: 2x - 20 = 6

    Answer: x = 13
  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 140 in the ratio 3:4

    Answer: 60 and 80
  5. 5. Statistics Mean

    Find the mean of: 13, 18, 8

    Answer: 13

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