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Cornerstone · Grades 3–5 Keystones #1 20 December 2020 Skills week 1 of 7
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Keystones — Cornerstone

Five GCSE retrieval questions · 20 December 2020 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Calculate: 3⁄7 + 1⁄7

    Answer: 4⁄7
  2. 2. Algebra Two-step equations

    Solve: 8x - 10 = 78

    Answer: x = 11
  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 36 in the ratio 1:2

    Answer: 12 and 24
  5. 5. Statistics Mean

    Find the mean of: 4, 13, 13, 19

    Answer: 12.25

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