21/11 = 110/11
Nothing.. Because 21 is a Prime number
7 with 11 remaining 158 - 11 = 147 = 21 x 7
There is no number that goes into both. must be a trick questionthis is another person not the same one :)the number that goes into 12 and 21 is 3 which is a 5th grade problemwho ever said theres no number that goes into 12 and 21 is WRONG!
The number is 1.
11 is a prime number but 21 is not a prime number as it is divisible by 3.
It is the number 1
21 is composite number because it has more than one number that goes into it
No even number gose in 21. In fact there is none that goes in 21, either.
The number is 1.
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