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Cornerstone · Grades 3–5 Keystones #1 29 July 2021 Skills week 1 of 7
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Five GCSE retrieval questions · 29 July 2021 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Calculate: 5⁄10 + 4⁄10

    Answer: 9⁄10
  2. 2. Algebra Two-step equations

    Solve: 4x + 9 = 33

    Answer: x = 6
  3. 3. Geometry Pythagoras — hypotenuse

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

    Answer: 7.07cm
  4. 4. Ratio Sharing in a ratio

    Divide 126 in the ratio 2:2:3

    Answer: 36, 36 and 54
  5. 5. Statistics Mean

    Calculate the mean of: 14, 9, 48, 35, 5, 28, 37

    Answer: 25.1

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