Which number should replace the question mark?[img]2011q4/ct_eyyjsaz2008_eyyjsa

游客2024-08-08 54

问题 Which number should replace the question mark?

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答案 15

解析 In each line, add the two figures at the sides and divide by two to get the central figure.Therefore (17+13)÷2=15．

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Whichnumbershouldreplacethequestionmark?[img]2011q4/ct_eyyjsaz2008_eyyjsa