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

  1. 1. Number Adding fractions

    Calculate: 2⁄5 + 2⁄5

    Answer: 4⁄5
  2. 2. Algebra Two-step equations

    Solve: 3x - 9 = 33

    Answer: x = 14
  3. 3. Geometry Pythagoras — hypotenuse

    Calculate the hypotenuse when a = 12cm and b = 13cm. Give your answer to 2 decimal places

    Answer: 17.69cm
  4. 4. Ratio Sharing in a ratio

    Divide 138 in the ratio 3:1:2

    Answer: 69, 23 and 46
  5. 5. Statistics Mean

    Find the mean of: 15, 12, 3

    Answer: 10

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