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Cornerstone · Grades 3–5 Keystones #1 21 October 2011 Skills week 1 of 7
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Five GCSE retrieval questions · 21 October 2011 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Calculate: 8⁄11 + 1⁄11

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

    Solve: 7x + 4 = 53

    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 98 in the ratio 1:4:2

    Answer: 14, 56 and 28
  5. 5. Statistics Mean

    Calculate the mean of: 33, 27, 29, 10, 14, 14. Give your answer to 2 decimal places

    Answer: 21.17

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