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

  1. 1. Number Adding fractions

    Calculate: 1⁄7 + 4⁄7

    Answer: 5⁄7
  2. 2. Algebra Two-step equations

    Solve: 6x + 3 = 33

    Answer: x = 5
  3. 3. Geometry Pythagoras — hypotenuse

    Find the hypotenuse of a right triangle with sides 15cm and 36cm

    Answer: 39cm
  4. 4. Ratio Sharing in a ratio

    Divide 77 in the ratio 4:1:2

    Answer: 44, 11 and 22
  5. 5. Statistics Mean

    Calculate the mean of: 30, 39, 11, 5, 28, 8, 32, 28. Give your answer to 2 decimal places

    Answer: 22.63

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