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Cornerstone · Grades 3–5 Keystones #1 22 November 2021 Skills week 1 of 7
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Five GCSE retrieval questions · 22 November 2021 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Add: 2⁄4 + 4⁄7

    Answer: 15⁄14
  2. 2. Algebra Two-step equations

    Solve: 2x + 5 = 23

    Answer: x = 9
  3. 3. Geometry Pythagoras — hypotenuse

    Calculate the hypotenuse when a = 8cm and b = 13cm

    Answer: 15.26cm
  4. 4. Ratio Sharing in a ratio

    Divide 156 in the ratio 3:2:1

    Answer: 78, 52 and 26
  5. 5. Statistics Mean

    Calculate the mean of: 49, 42, 46, 43, 29, 22, 30

    Answer: 37.3

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