Please look at these numbers:1,3,5,______ ,11.What is the missing number in English?

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Please look at these numbers:1,3,5,______ ,11.What is the missing number in English?
Please look at these numbers:1,3,5,______ ,11.What is the missing number in English?

Please look at these numbers:1,3,5,______ ,11.What is the missing number in English?
从数学上来看,这是一个等差数列,公差为2.所以5+2=7;7+2=9,9+2=11.
所以缺失的属为7和9.
7的英语为seven
9的英语为nine.
所以答案为,seven,nine