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Cornerstone · Grades 3–5 Keystones #1 12 June 2011 Skills week 1 of 7
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Five GCSE retrieval questions · 12 June 2011 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Add: 1⁄6 + 2⁄3

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

    Solve: 4x - 5 = 19

    Answer: x = 6
  3. 3. Geometry Pythagoras — hypotenuse

    Find the hypotenuse of a right triangle with sides 3cm and 4cm

    Answer: 5cm
  4. 4. Ratio Sharing in a ratio

    Divide 210 in the ratio 2:1:4

    Answer: 60, 30 and 120
  5. 5. Statistics Mean

    Calculate the mean of: 33, 26, 5, 14, 50, 35, 28, 14. Give your answer to 2 decimal places

    Answer: 25.63

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