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Cornerstone · Grades 3–5 Keystones #1 15 November 2010 Skills week 1 of 7
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Five GCSE retrieval questions · 15 November 2010 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Calculate: 6⁄8 + 1⁄8

    Answer: 7⁄8
  2. 2. Algebra Two-step equations

    Solve: 4x + 5 = 25

    Answer: x = 5
  3. 3. Geometry Pythagoras — hypotenuse

    Calculate the hypotenuse when a = 5cm and b = 14cm. Give your answer to 2 decimal places

    Answer: 14.87cm
  4. 4. Ratio Sharing in a ratio

    Share 45 in the ratio 2:1

    Answer: 30 and 15
  5. 5. Statistics Mean

    Calculate the mean of: 40, 17, 38, 35, 30, 46, 46, 46

    Answer: 37.25

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