What is the missing number?20,30,50,40,( ),50,( ),60,( ),70,( )

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Whatisthemissingnumber?20,30,50,40,(),50,(),60,(),70,()Whatisthemissingnumber?20,30,50,40,(),50,(),6

What is the missing number?20,30,50,40,( ),50,( ),60,( ),70,( )
What is the missing number?20,30,50,40,( ),50,( ),60,( ),70,( )

What is the missing number?20,30,50,40,( ),50,( ),60,( ),70,( )
60,70,80,90

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答案是60,70.80,90。按照比例是20 ,30,50,40之间差的比例都是10,20,10,20.......

20 ,30,50,40之间差的比例都是10,20,10,20
所以答案是60,70.80,90

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