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Cornerstone · Grades 3–5 Keystones #1 8 October 2021 Skills week 1 of 7
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Five GCSE retrieval questions · 8 October 2021 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Calculate: 3⁄5 + 1⁄5

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

    Solve: 6x + 9 = 69

    Answer: x = 10
  3. 3. Geometry Pythagoras — hypotenuse

    Calculate the hypotenuse when a = 6cm and b = 6cm

    Answer: 8.49cm
  4. 4. Ratio Sharing in a ratio

    Divide 60 in the ratio 1:2:3

    Answer: 10, 20 and 30
  5. 5. Statistics Mean

    Find the mean of: 14, 7, 6, 3

    Answer: 7.5

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