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Cornerstone · Grades 3–5 Keystones #1 20 October 2010 Skills week 1 of 7
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Five GCSE retrieval questions · 20 October 2010 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Calculate: 1⁄7 + 4⁄7

    Answer: 5⁄7
  2. 2. Algebra Two-step equations

    Solve: 2x - 6 = 4

    Answer: x = 5
  3. 3. Geometry Pythagoras — hypotenuse

    Calculate the hypotenuse when a = 12cm and b = 13cm. Give your answer to 2 decimal places

    Answer: 17.69cm
  4. 4. Ratio Sharing in a ratio

    Divide 180 in the ratio 4:3:3

    Answer: 72, 54 and 54
  5. 5. Statistics Mean

    Find the mean of: 6, 15, 15

    Answer: 12

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