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Cornerstone · Grades 3–5 Keystones #1 27 July 2013 Skills week 1 of 7
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Five GCSE retrieval questions · 27 July 2013 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Add: 3⁄7 + 4⁄5

    Answer: 43⁄35
  2. 2. Algebra Two-step equations

    Solve: 5x + 13 = 73

    Answer: x = 12
  3. 3. Geometry Pythagoras — hypotenuse

    Calculate the hypotenuse when a = 11cm and b = 14cm. Give your answer to 2 decimal places

    Answer: 17.8cm
  4. 4. Ratio Sharing in a ratio

    Divide 50 in the ratio 3:1:1

    Answer: 30, 10 and 10
  5. 5. Statistics Mean

    Calculate the mean of: 38, 26, 34, 38, 24, 26, 33, 29

    Answer: 31

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