105/60,98/96,91/52,84/48,(),21/12 A.77/42 B.76/44 C.62/36 D.7/4 答案为什么是D?

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105/60,98/96,91/52,84/48,(),21/12A.77/42B.76/44C.62/36D.7/4答案为什么是D?105/60,98/96,91/52,84/48,(),21/12

105/60,98/96,91/52,84/48,(),21/12 A.77/42 B.76/44 C.62/36 D.7/4 答案为什么是D?
105/60,98/96,91/52,84/48,(),21/12 A.77/42 B.76/44 C.62/36 D.7/4 答案为什么是D?

105/60,98/96,91/52,84/48,(),21/12 A.77/42 B.76/44 C.62/36 D.7/4 答案为什么是D?
就前四对数来看:把两个数相加个位数依次为5,4,3,2所以选D最后一对数.看不懂了

105/60=7/4,98/56=7/4,91/52=7/4 , 84/48=7/4 , 21/12=7/4