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

  1. 1. Number Adding fractions

    Calculate: 7⁄9 + 1⁄9

    Answer: 8⁄9
  2. 2. Algebra Two-step equations

    Solve: 7x + 5 = 75

    Answer: x = 10
  3. 3. Geometry Pythagoras — hypotenuse

    Calculate the hypotenuse when a = 10cm and b = 9cm. Give your answer to 2 decimal places

    Answer: 13.45cm
  4. 4. Ratio Sharing in a ratio

    Divide 108 in the ratio 1:4:1

    Answer: 18, 72 and 18
  5. 5. Statistics Mean

    Calculate the mean of: 12, 50, 50, 27, 47, 23. Give your answer to 2 decimal places

    Answer: 34.83

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