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Cornerstone · Grades 3–5 Keystones #1 17 September 2014 Skills week 1 of 7
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Five GCSE retrieval questions · 17 September 2014 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Calculate: 5⁄7 + 1⁄7

    Answer: 6⁄7
  2. 2. Algebra Two-step equations

    Solve: 2x - 13 = 13

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

    Calculate the hypotenuse when a = 8cm and b = 12cm. Give your answer to 2 decimal places

    Answer: 14.42cm
  4. 4. Ratio Sharing in a ratio

    Divide 126 in the ratio 1:3:3

    Answer: 18, 54 and 54
  5. 5. Statistics Mean

    Find the mean of: 13, 2, 21

    Answer: 12

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