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Cornerstone · Grades 3–5 Keystones #1 16 September 2020 Skills week 1 of 7
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Five GCSE retrieval questions · 16 September 2020 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Calculate: 5⁄10 + 4⁄10

    Answer: 9⁄10
  2. 2. Algebra Two-step equations

    Solve: 6x + 7 = 79

    Answer: x = 12
  3. 3. Geometry Pythagoras — hypotenuse

    Calculate the hypotenuse when a = 6cm and b = 15cm

    Answer: 16.16cm
  4. 4. Ratio Sharing in a ratio

    Divide 125 in the ratio 2:1:2

    Answer: 50, 25 and 50
  5. 5. Statistics Mean

    Find the mean of: 7, 4, 15

    Answer: 8.6666666666667

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