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Cornerstone · Grades 3–5 Keystones #1 27 June 2010 Skills week 1 of 7
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Five GCSE retrieval questions · 27 June 2010 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Calculate: 4⁄10 + 3⁄10

    Answer: 7⁄10
  2. 2. Algebra Two-step equations

    Solve: 3x - 19 = 26

    Answer: x = 15
  3. 3. Geometry Pythagoras — hypotenuse

    Find the hypotenuse of a right triangle with sides 15cm and 20cm

    Answer: 25cm
  4. 4. Ratio Sharing in a ratio

    Divide 275 in the ratio 4:4:3

    Answer: 100, 100 and 75
  5. 5. Statistics Mean

    Find the mean of: 7, 20, 14, 15

    Answer: 14

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