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Cornerstone · Grades 3–5 Keystones #1 6 November 2010 Skills week 1 of 7
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Keystones — Cornerstone

Five GCSE retrieval questions · 6 November 2010 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Calculate: 8⁄11 + 1⁄11

    Answer: 9⁄11
  2. 2. Algebra Two-step equations

    Solve: 6x - 5 = 37

    Answer: x = 7
  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

    Divide 270 in the ratio 2:1:2

    Answer: 108, 54 and 108
  5. 5. Statistics Mean

    Calculate the mean of: 41, 23, 21, 36, 17, 33, 18, 47

    Answer: 29.5

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