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Cornerstone · Grades 3–5 Keystones #1 17 June 2011 Skills week 1 of 7
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Five GCSE retrieval questions · 17 June 2011 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Add: 1⁄4 + 2⁄8

    Answer: 1⁄2
  2. 2. Algebra Two-step equations

    Solve: 5x + 8 = 43

    Answer: x = 7
  3. 3. Geometry Pythagoras — hypotenuse

    Find the hypotenuse of a right triangle with sides 20cm and 21cm

    Answer: 29cm
  4. 4. Ratio Sharing in a ratio

    Share 25 in the ratio 1:4

    Answer: 5 and 20
  5. 5. Statistics Mean

    Calculate the mean of: 7, 44, 46, 49, 50, 12, 25. Give your answer to 2 decimal places

    Answer: 33.29

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