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Cornerstone · Grades 3–5 Keystones #1 13 November 2019 Skills week 1 of 7
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Five GCSE retrieval questions · 13 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: 6x + 6 = 48

    Answer: x = 7
  3. 3. Geometry Pythagoras — hypotenuse

    Calculate the hypotenuse when a = 9cm and b = 8cm

    Answer: 12.04cm
  4. 4. Ratio Sharing in a ratio

    Divide 240 in the ratio 1:4:3

    Answer: 30, 120 and 90
  5. 5. Statistics Mean

    Calculate the mean of: 34, 44, 16, 36, 39, 47

    Answer: 36

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