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Cornerstone · Grades 3–5 Keystones #1 9 November 2020 Skills week 1 of 7
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Five GCSE retrieval questions · 9 November 2020 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Calculate: 7⁄10 + 2⁄10

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

    Solve: 5x + 11 = 31

    Answer: x = 4
  3. 3. Geometry Pythagoras — hypotenuse

    Find the hypotenuse of a right triangle with sides 9cm and 12cm

    Answer: 15cm
  4. 4. Ratio Sharing in a ratio

    Share 77 in the ratio 3:4

    Answer: 33 and 44
  5. 5. Statistics Mean

    Calculate the mean of: 42, 11, 15, 24, 18, 34, 50, 21

    Answer: 26.9

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