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Cornerstone · Grades 3–5 Keystones #1 20 November 2019 Skills week 1 of 7
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Five GCSE retrieval questions · 20 November 2019 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Calculate: 3⁄7 + 1⁄7

    Answer: 4⁄7
  2. 2. Algebra Two-step equations

    Solve: 2x - 20 = 6

    Answer: x = 13
  3. 3. Geometry Pythagoras — hypotenuse

    Find the hypotenuse of a right triangle with sides 20cm and 21cm

    Answer: 29cm
  4. 4. Ratio Sharing in a ratio

    Share 77 in the ratio 4:3

    Answer: 44 and 33
  5. 5. Statistics Mean

    Find the mean of: 2, 18, 18

    Answer: 12.666666666667

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