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Cornerstone · Grades 3–5 Keystones #1 19 August 2014 Skills week 1 of 7
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Keystones — Cornerstone

Five GCSE retrieval questions · 19 August 2014 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Add: 1⁄6 + 4⁄7

    Answer: 31⁄42
  2. 2. Algebra Two-step equations

    Solve: 5x - 5 = 65

    Answer: x = 14
  3. 3. Geometry Pythagoras — hypotenuse

    Calculate the hypotenuse when a = 9cm and b = 12cm

    Answer: 15cm
  4. 4. Ratio Sharing in a ratio

    Share 51 in the ratio 1:2

    Answer: 17 and 34
  5. 5. Statistics Mean

    Calculate the mean of: 9, 15, 31, 26, 11, 28, 11, 20. Give your answer to 2 decimal places

    Answer: 18.88

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