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Cornerstone · Grades 3–5 Keystones #1 8 December 2010 Skills week 1 of 7
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Five GCSE retrieval questions · 8 December 2010 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Add: 3⁄4 + 1⁄3

    Answer: 13⁄12
  2. 2. Algebra Two-step equations

    Solve: 7x + 12 = 61

    Answer: x = 7
  3. 3. Geometry Pythagoras — hypotenuse

    Find the hypotenuse of a right triangle with sides 7cm and 24cm

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

    Share 70 in the ratio 4:1

    Answer: 56 and 14
  5. 5. Statistics Mean

    Find the mean of: 10, 17, 3

    Answer: 10

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