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Cornerstone · Grades 3–5 Keystones #1 21 July 2011 Skills week 1 of 7
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Five GCSE retrieval questions · 21 July 2011 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Calculate: 8⁄12 + 1⁄12

    Answer: 3⁄4
  2. 2. Algebra Two-step equations

    Solve: 6x - 19 = 59

    Answer: x = 13
  3. 3. Geometry Pythagoras — hypotenuse

    Calculate the hypotenuse when a = 5cm and b = 10cm. Give your answer to 2 decimal places

    Answer: 11.18cm
  4. 4. Ratio Sharing in a ratio

    Divide 150 in the ratio 1:2:3

    Answer: 25, 50 and 75
  5. 5. Statistics Mean

    Find the mean of: 23, 7, 13, 9

    Answer: 13

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