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Cornerstone · Grades 3–5 Keystones #1 25 July 2010 Skills week 1 of 7
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Five GCSE retrieval questions · 25 July 2010 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Calculate: 7⁄10 + 2⁄10

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

    Solve: 2x - 11 = 7

    Answer: x = 9
  3. 3. Geometry Pythagoras — hypotenuse

    Find the hypotenuse of a right triangle with sides 9cm and 40cm

    Answer: 41cm
  4. 4. Ratio Sharing in a ratio

    Share 65 in the ratio 4:1

    Answer: 52 and 13
  5. 5. Statistics Mean

    Calculate the mean of: 43, 42, 47, 24, 45, 49, 7, 27

    Answer: 35.5

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