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Cornerstone · Grades 3–5 Keystones #1 22 November 2020 Skills week 1 of 7
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Five GCSE retrieval questions · 22 November 2020 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Calculate: 4⁄9 + 1⁄9

    Answer: 5⁄9
  2. 2. Algebra Two-step equations

    Solve: 3x + 6 = 18

    Answer: x = 4
  3. 3. Geometry Pythagoras — hypotenuse

    Calculate the hypotenuse when a = 3cm and b = 10cm

    Answer: 10.44cm
  4. 4. Ratio Sharing in a ratio

    Divide 168 in the ratio 1:4:3

    Answer: 21, 84 and 63
  5. 5. Statistics Mean

    Calculate the mean of: 36, 12, 5, 8, 31, 30, 43, 20

    Answer: 23.1

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