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

  1. 1. Number Adding fractions

    Add: 2⁄6 + 1⁄5

    Answer: 8⁄15
  2. 2. Algebra Two-step equations

    Solve: 6x - 7 = 65

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

    Calculate the hypotenuse when a = 7cm and b = 14cm. Give your answer to 2 decimal places

    Answer: 15.65cm
  4. 4. Ratio Sharing in a ratio

    Share 15 in the ratio 2:1

    Answer: 10 and 5
  5. 5. Statistics Mean

    Find the mean of: 16, 11, 2, 14, 17

    Answer: 12

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