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Cornerstone · Grades 3–5 Keystones #1 18 November 2020 Skills week 1 of 7
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Five GCSE retrieval questions · 18 November 2020 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Calculate: 3⁄5 + 1⁄5

    Answer: 4⁄5
  2. 2. Algebra Two-step equations

    Solve: 3x + 4 = 22

    Answer: x = 6
  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 270 in the ratio 3:3:4

    Answer: 81, 81 and 108
  5. 5. Statistics Mean

    Find the mean of: 7, 4, 19

    Answer: 10

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