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Cornerstone · Grades 3–5 Keystones #1 9 September 2013 Skills week 1 of 7
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Five GCSE retrieval questions · 9 September 2013 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Calculate: 1⁄9 + 5⁄9

    Answer: 2⁄3
  2. 2. Algebra Two-step equations

    Solve: 2x + 6 = 20

    Answer: x = 7
  3. 3. Geometry Pythagoras — hypotenuse

    Calculate the hypotenuse when a = 8cm and b = 10cm. Give your answer to 2 decimal places

    Answer: 12.81cm
  4. 4. Ratio Sharing in a ratio

    Share 112 in the ratio 4:3

    Answer: 64 and 48
  5. 5. Statistics Mean

    Calculate the mean of: 31, 50, 36, 28, 20, 5, 9. Give your answer to 2 decimal places

    Answer: 25.57

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