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Cornerstone · Grades 3–5 Keystones #1 10 December 2019 Skills week 1 of 7
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Five GCSE retrieval questions · 10 December 2019 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Calculate: 4⁄9 + 2⁄9

    Answer: 2⁄3
  2. 2. Algebra Two-step equations

    Solve: 6x + 10 = 52

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

    Calculate the hypotenuse when a = 9cm and b = 5cm

    Answer: 10.3cm
  4. 4. Ratio Sharing in a ratio

    Share 45 in the ratio 2:3

    Answer: 18 and 27
  5. 5. Statistics Mean

    Calculate the mean of: 47, 28, 16, 35, 10, 36, 45

    Answer: 31

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