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Cornerstone · Grades 3–5 Keystones #1 26 September 2010 Skills week 1 of 7
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Keystones — Cornerstone

Five GCSE retrieval questions · 26 September 2010 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Calculate: 5⁄11 + 5⁄11

    Answer: 10⁄11
  2. 2. Algebra Two-step equations

    Solve: 6x + 12 = 30

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

    Calculate the hypotenuse when a = 10cm and b = 13cm. Give your answer to 2 decimal places

    Answer: 16.4cm
  4. 4. Ratio Sharing in a ratio

    Divide 180 in the ratio 2:4:3

    Answer: 40, 80 and 60
  5. 5. Statistics Mean

    Calculate the mean of: 9, 29, 23, 38, 9, 6, 38, 17. Give your answer to 2 decimal places

    Answer: 21.13

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