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Cornerstone · Grades 3–5 Keystones #1 31 December 2019 Skills week 1 of 7
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Five GCSE retrieval questions · 31 December 2019 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Calculate: 8⁄10 + 1⁄10

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

    Solve: 2x - 11 = 15

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

    Find the hypotenuse of a right triangle with sides 5cm and 12cm

    Answer: 13cm
  4. 4. Ratio Sharing in a ratio

    Share 102 in the ratio 1:2

    Answer: 34 and 68
  5. 5. Statistics Mean

    Calculate the mean of: 23, 39, 49, 23, 49, 20, 17

    Answer: 31.4

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