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Cornerstone · Grades 3–5 Keystones #1 27 February 2021 Skills week 1 of 7
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Five GCSE retrieval questions · 27 February 2021 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Calculate: 2⁄10 + 4⁄10

    Answer: 3⁄5
  2. 2. Algebra Two-step equations

    Solve: 8x - 14 = 82

    Answer: x = 12
  3. 3. Geometry Pythagoras — hypotenuse

    Calculate the hypotenuse when a = 12cm and b = 10cm

    Answer: 15.62cm
  4. 4. Ratio Sharing in a ratio

    Divide 165 in the ratio 4:3:4

    Answer: 60, 45 and 60
  5. 5. Statistics Mean

    Calculate the mean of: 6, 27, 14, 9, 23, 18

    Answer: 16.2

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