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Cornerstone · Grades 3–5 Keystones #1 10 November 2020 Skills week 1 of 7
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Five GCSE retrieval questions · 10 November 2020 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Calculate: 6⁄11 + 4⁄11

    Answer: 10⁄11
  2. 2. Algebra Two-step equations

    Solve: 2x + 10 = 32

    Answer: x = 11
  3. 3. Geometry Pythagoras — hypotenuse

    Calculate the hypotenuse when a = 11cm and b = 13cm

    Answer: 17.03cm
  4. 4. Ratio Sharing in a ratio

    Share 45 in the ratio 4:1

    Answer: 36 and 9
  5. 5. Statistics Mean

    Calculate the mean of: 21, 17, 10, 11, 20, 21

    Answer: 16.7

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