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Cornerstone · Grades 3–5 Keystones #1 22 December 2010 Skills week 1 of 7
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Five GCSE retrieval questions · 22 December 2010 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Calculate: 3⁄6 + 2⁄6

    Answer: 5⁄6
  2. 2. Algebra Two-step equations

    Solve: 7x - 6 = 22

    Answer: x = 4
  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 78 in the ratio 1:3:2

    Answer: 13, 39 and 26
  5. 5. Statistics Mean

    Calculate the mean of: 11, 15, 14, 15, 11, 38, 15, 46. Give your answer to 2 decimal places

    Answer: 20.63

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