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Cornerstone · Grades 3–5 Keystones #1 29 November 2013 Skills week 1 of 7
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Five GCSE retrieval questions · 29 November 2013 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Calculate: 6⁄10 + 1⁄10

    Answer: 7⁄10
  2. 2. Algebra Two-step equations

    Solve: 2x - 13 = 7

    Answer: x = 10
  3. 3. Geometry Pythagoras — hypotenuse

    Calculate the hypotenuse when a = 9cm and b = 15cm. Give your answer to 2 decimal places

    Answer: 17.49cm
  4. 4. Ratio Sharing in a ratio

    Share 25 in the ratio 4:1

    Answer: 20 and 5
  5. 5. Statistics Mean

    Calculate the mean of: 40, 32, 11, 13, 12, 24, 30, 47. Give your answer to 2 decimal places

    Answer: 26.13

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