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Cornerstone · Grades 3–5 Keystones #1 16 January 2019 Skills week 1 of 7
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Five GCSE retrieval questions · 16 January 2019 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Calculate: 8⁄11 + 2⁄11

    Answer: 10⁄11
  2. 2. Algebra Two-step equations

    Solve: 8x - 19 = 29

    Answer: x = 6
  3. 3. Geometry Pythagoras — hypotenuse

    Find the hypotenuse of a right triangle with sides 8cm and 15cm

    Answer: 17cm
  4. 4. Ratio Sharing in a ratio

    Share 80 in the ratio 3:2

    Answer: 48 and 32
  5. 5. Statistics Mean

    Calculate the mean of: 40, 30, 50, 19, 50, 32, 49

    Answer: 38.6

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