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No. The first odd number, counting up from one, that is not a Prime number, is 9.
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Why is every prime number greater then 2 an odd number?
Because if they were even they would be a multiple of 2 and thus not prime.
Is every prime number odd?
Every single prime number Is odd , with the exception of 2 being an even number , but ... Not every single odd number is going to be prime. Example: 9-1,3,9
Can every odd number greater than 3 be written as the sum of two prime numbers?
No.Consider that every prime number except 2 is an odd number.Consider also that the sum of two odd numbers is always an even number.Thus, the only case in which an odd number can be expressed as the sum of two primes is when it is 2 greater than a prime number, since it can take advantage of the only even prime number, 2.For example, 21 can be expressed as 2+19, both of which are primes. However, 27 has no such two primes, since 25 is not prime (5x5=25).
Which is the smallest co prime number?
2 is the smallest prime number. It is co-prime with every odd number.
What number is both prime and odd?
The only number that is both prime and odd is the number 2. This is because a prime number is defined as a number greater than 1 that has no positive divisors other than 1 and itself. Since 2 is the only even prime number, all other prime numbers are odd.
