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Cornerstone · Grades 3–5 Keystones #1 6 November 2019 Skills week 1 of 7
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Keystones — Cornerstone

Five GCSE retrieval questions · 6 November 2019 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Add: 1⁄3 + 4⁄7

    Answer: 19⁄21
  2. 2. Algebra Two-step equations

    Solve: 5x + 12 = 27

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

    Calculate the hypotenuse when a = 11cm and b = 8cm

    Answer: 13.6cm
  4. 4. Ratio Sharing in a ratio

    Divide 108 in the ratio 2:1:3

    Answer: 36, 18 and 54
  5. 5. Statistics Mean

    Calculate the mean of: 27, 20, 48, 29, 24, 38, 37, 5

    Answer: 28.5

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