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Cornerstone · Grades 3–5 Keystones #1 12 December 2013 Skills week 1 of 7
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Five GCSE retrieval questions · 12 December 2013 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Add: 2⁄6 + 1⁄7

    Answer: 10⁄21
  2. 2. Algebra Two-step equations

    Solve: 2x + 12 = 34

    Answer: x = 11
  3. 3. Geometry Pythagoras — hypotenuse

    Calculate the hypotenuse when a = 8cm and b = 14cm. Give your answer to 2 decimal places

    Answer: 16.12cm
  4. 4. Ratio Sharing in a ratio

    Divide 330 in the ratio 4:4:3

    Answer: 120, 120 and 90
  5. 5. Statistics Mean

    Calculate the mean of: 31, 19, 15, 20, 12, 49, 17, 49

    Answer: 26.5

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