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Cornerstone · Grades 3–5 Keystones #1 10 March 2011 Skills week 1 of 7
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Keystones — Cornerstone

Five GCSE retrieval questions · 10 March 2011 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Calculate: 9⁄11 + 1⁄11

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

    Solve: 2x + 12 = 20

    Answer: x = 4
  3. 3. Geometry Pythagoras — hypotenuse

    Calculate the hypotenuse when a = 12cm and b = 14cm. Give your answer to 2 decimal places

    Answer: 18.44cm
  4. 4. Ratio Sharing in a ratio

    Divide 180 in the ratio 3:2:1

    Answer: 90, 60 and 30
  5. 5. Statistics Mean

    Calculate the mean of: 8, 26, 28, 13, 40, 5, 31. Give your answer to 2 decimal places

    Answer: 21.57

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