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Cornerstone · Grades 3–5 Keystones #1 14 April 2010 Skills week 1 of 7
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Five GCSE retrieval questions · 14 April 2010 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Add: 1⁄6 + 4⁄5

    Answer: 29⁄30
  2. 2. Algebra Two-step equations

    Solve: 6x - 11 = 49

    Answer: x = 10
  3. 3. Geometry Pythagoras — hypotenuse

    Find the hypotenuse of a right triangle with sides 15cm and 20cm

    Answer: 25cm
  4. 4. Ratio Sharing in a ratio

    Share 80 in the ratio 3:2

    Answer: 48 and 32
  5. 5. Statistics Mean

    Calculate the mean of: 33, 27, 36, 26, 14, 16. Give your answer to 2 decimal places

    Answer: 25.33

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