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

  1. 1. Number Adding fractions

    Calculate: 6⁄9 + 2⁄9

    Answer: 8⁄9
  2. 2. Algebra Two-step equations

    Solve: 2x + 12 = 22

    Answer: x = 5
  3. 3. Geometry Pythagoras — hypotenuse

    Calculate the hypotenuse when a = 5cm and b = 6cm

    Answer: 7.81cm
  4. 4. Ratio Sharing in a ratio

    Divide 77 in the ratio 1:3:3

    Answer: 11, 33 and 33
  5. 5. Statistics Mean

    Find the mean of: 8, 6, 3

    Answer: 5.6666666666667

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