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Cornerstone · Grades 3–5 Keystones #1 6 December 2010 Skills week 1 of 7
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Five GCSE retrieval questions · 6 December 2010 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Calculate: 1⁄5 + 1⁄5

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

    Solve: 2x - 12 = 0

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

    Calculate the hypotenuse when a = 7cm and b = 12cm. Give your answer to 2 decimal places

    Answer: 13.89cm
  4. 4. Ratio Sharing in a ratio

    Share 64 in the ratio 1:3

    Answer: 16 and 48
  5. 5. Statistics Mean

    Calculate the mean of: 16, 42, 25, 7, 19, 48, 24, 23

    Answer: 25.5

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