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Cornerstone · Grades 3–5 Keystones #1 7 September 2019 Skills week 1 of 7
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Keystones — Cornerstone

Five GCSE retrieval questions · 7 September 2019 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Calculate: 6⁄11 + 2⁄11

    Answer: 8⁄11
  2. 2. Algebra Two-step equations

    Solve: 2x + 13 = 23

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

    Calculate the hypotenuse when a = 12cm and b = 7cm

    Answer: 13.89cm
  4. 4. Ratio Sharing in a ratio

    Divide 162 in the ratio 2:3:1

    Answer: 54, 81 and 27
  5. 5. Statistics Mean

    Calculate the mean of: 23, 40, 17, 44, 26, 27

    Answer: 29.5

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