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Cornerstone · Grades 3–5 Keystones #1 12 October 2022 Skills week 1 of 7
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Five GCSE retrieval questions · 12 October 2022 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Calculate: 3⁄10 + 6⁄10

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

    Solve: 4x + 6 = 42

    Answer: x = 9
  3. 3. Geometry Pythagoras — hypotenuse

    Calculate the hypotenuse when a = 7cm and b = 15cm

    Answer: 16.55cm
  4. 4. Ratio Sharing in a ratio

    Share 50 in the ratio 4:1

    Answer: 40 and 10
  5. 5. Statistics Mean

    Calculate the mean of: 6, 5, 37, 7, 38, 6, 14, 49

    Answer: 20.3

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