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Cornerstone · Grades 3–5 Keystones #1 24 April 2010 Skills week 1 of 7
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Keystones — Cornerstone

Five GCSE retrieval questions · 24 April 2010 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Add: 6⁄8 + 2⁄3

    Answer: 17⁄12
  2. 2. Algebra Two-step equations

    Solve: 7x + 3 = 73

    Answer: x = 10
  3. 3. Geometry Pythagoras — hypotenuse

    Find the hypotenuse of a right triangle with sides 9cm and 12cm

    Answer: 15cm
  4. 4. Ratio Sharing in a ratio

    Divide 126 in the ratio 2:2:3

    Answer: 36, 36 and 54
  5. 5. Statistics Mean

    Find the mean of: 7, 5, 6

    Answer: 6

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