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Cornerstone · Grades 3–5 Keystones #1 24 April 2013 Skills week 1 of 7
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Five GCSE retrieval questions · 24 April 2013 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Calculate: 3⁄5 + 1⁄5

    Answer: 4⁄5
  2. 2. Algebra Two-step equations

    Solve: 5x + 10 = 70

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

    Calculate the hypotenuse when a = 3cm and b = 14cm. Give your answer to 2 decimal places

    Answer: 14.32cm
  4. 4. Ratio Sharing in a ratio

    Share 30 in the ratio 1:2

    Answer: 10 and 20
  5. 5. Statistics Mean

    Calculate the mean of: 27, 27, 6, 13, 41, 20, 23. Give your answer to 2 decimal places

    Answer: 22.43

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