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Cornerstone · Grades 3–5 Keystones #1 4 September 2021 Skills week 1 of 7
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Five GCSE retrieval questions · 4 September 2021 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Calculate: 3⁄6 + 2⁄6

    Answer: 5⁄6
  2. 2. Algebra Two-step equations

    Solve: 4x + 13 = 45

    Answer: x = 8
  3. 3. Geometry Pythagoras — hypotenuse

    Calculate the hypotenuse when a = 7cm and b = 9cm

    Answer: 11.4cm
  4. 4. Ratio Sharing in a ratio

    Share 85 in the ratio 4:1

    Answer: 68 and 17
  5. 5. Statistics Mean

    Calculate the mean of: 6, 10, 11, 49, 9, 10, 26

    Answer: 17.3

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