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Cornerstone · Grades 3–5 Keystones #1 20 September 2010 Skills week 1 of 7
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Five GCSE retrieval questions · 20 September 2010 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Add: 2⁄4 + 7⁄8

    Answer: 11⁄8
  2. 2. Algebra Two-step equations

    Solve: 4x - 19 = 41

    Answer: x = 15
  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 75 in the ratio 1:4

    Answer: 15 and 60
  5. 5. Statistics Mean

    Calculate the mean of: 39, 35, 11, 45, 41, 19, 22, 20

    Answer: 29

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