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Cornerstone · Grades 3–5 Keystones #1 29 September 2010 Skills week 1 of 7
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Five GCSE retrieval questions · 29 September 2010 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Calculate: 2⁄10 + 4⁄10

    Answer: 3⁄5
  2. 2. Algebra Two-step equations

    Solve: 3x + 10 = 43

    Answer: x = 11
  3. 3. Geometry Pythagoras — hypotenuse

    Calculate the hypotenuse when a = 12cm and b = 6cm. Give your answer to 2 decimal places

    Answer: 13.42cm
  4. 4. Ratio Sharing in a ratio

    Divide 120 in the ratio 1:4:1

    Answer: 20, 80 and 20
  5. 5. Statistics Mean

    Calculate the mean of: 34, 35, 9, 17, 15, 18. Give your answer to 2 decimal places

    Answer: 21.33

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