0
Anonymous
Only 1 goes in to 9 and 11 as a whole number. Technically any number can go into any number.
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1
It is 1
33*9=273*11=33
9 and 11
9, 10 and 11 if exactly 3 times, or every number from 1 to 11 if at least 3 times.
The number is 1.