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Cornerstone · Grades 3–5 Keystones #1 22 February 2011 Skills week 1 of 7
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Five GCSE retrieval questions · 22 February 2011 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Calculate: 1⁄5 + 3⁄5

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

    Solve: 6x - 15 = 69

    Answer: x = 14
  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 60 in the ratio 2:2:1

    Answer: 24, 24 and 12
  5. 5. Statistics Mean

    Calculate the mean of: 35, 46, 25, 12, 47, 11, 27, 44. Give your answer to 2 decimal places

    Answer: 30.88

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