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Cornerstone · Grades 3–5 Keystones #1 9 October 2012 Skills week 1 of 7
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Five GCSE retrieval questions · 9 October 2012 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Calculate: 1⁄5 + 1⁄5

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

    Solve: 3x + 3 = 21

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

    Calculate the hypotenuse when a = 9cm and b = 15cm. Give your answer to 2 decimal places

    Answer: 17.49cm
  4. 4. Ratio Sharing in a ratio

    Divide 208 in the ratio 1:1:2

    Answer: 52, 52 and 104
  5. 5. Statistics Mean

    Find the mean of: 19, 5, 11, 5

    Answer: 10

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