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Cornerstone · Grades 3–5 Keystones #1 10 January 2011 Skills week 1 of 7
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Five GCSE retrieval questions · 10 January 2011 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Calculate: 4⁄6 + 1⁄6

    Answer: 5⁄6
  2. 2. Algebra Two-step equations

    Solve: 8x - 6 = 98

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

    Calculate the hypotenuse when a = 7cm and b = 7cm. Give your answer to 2 decimal places

    Answer: 9.9cm
  4. 4. Ratio Sharing in a ratio

    Divide 110 in the ratio 3:4:4

    Answer: 30, 40 and 40
  5. 5. Statistics Mean

    Calculate the mean of: 15, 18, 39, 27, 37, 13, 22. Give your answer to 2 decimal places

    Answer: 24.43

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