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Cornerstone · Grades 3–5 Keystones #1 12 November 2012 Skills week 1 of 7
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Five GCSE retrieval questions · 12 November 2012 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Calculate: 3⁄8 + 2⁄8

    Answer: 5⁄8
  2. 2. Algebra Two-step equations

    Solve: 6x + 10 = 76

    Answer: x = 11
  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 35 in the ratio 4:3

    Answer: 20 and 15
  5. 5. Statistics Mean

    Calculate the mean of: 43, 19, 31, 5, 13, 14. Give your answer to 2 decimal places

    Answer: 20.83

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