21 is an odd composite number
An odd number is an integer that is not evenly divisible by 2. A composite number is a positive number that has divisors other than 1 and itself. So any odd number greater than 1 that is not prime would be a composite odd number. For example, 9, 15, 21, and 25 are odd composite number because the are odd and they have divisors. 1, 3, 5, and 7 are not composite because they are only divisible by 1 and themselves.
An even number can be divided by 2 evenly. An odd number will have a remainder of 1 when divided by 2. Composites can be either.
81 is an odd composite number.
It is neither but it is an even number because it's between two odd numbers
The smallest number that is both odd and composite is 9, which is divisible by 3. The odd numbers are 1, 3, 5, 7, 9, 11, ..., and 1, 3, 5, and 7 are all prime. It is 9 that is the smallest odd composite number.
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15 and 9 are both odd, composite numbers less than 20.
27,33,35,39
21 is an odd composite number
35 is an odd composite number
An odd number is an integer that is not evenly divisible by 2. A composite number is a positive number that has divisors other than 1 and itself. So any odd number greater than 1 that is not prime would be a composite odd number. For example, 9, 15, 21, and 25 are odd composite number because the are odd and they have divisors. 1, 3, 5, and 7 are not composite because they are only divisible by 1 and themselves.
An even number can be divided by 2 evenly. An odd number will have a remainder of 1 when divided by 2. Composites can be either.
Yes
It is a composite odd number
It is impossible to list the infinite number of composite odd numbers.
81 is an odd composite number.