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

  1. 1. Number Adding fractions

    Calculate: 4⁄11 + 5⁄11

    Answer: 9⁄11
  2. 2. Algebra Two-step equations

    Solve: 2x - 5 = 9

    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

    Divide 114 in the ratio 1:4:1

    Answer: 19, 76 and 19
  5. 5. Statistics Mean

    Calculate the mean of: 25, 38, 15, 13, 34, 14. Give your answer to 2 decimal places

    Answer: 23.17

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