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no. 3 and 11 are prime numbers. 12 is not a prime number as it can be divided by other things apart from itself and one. these other numbers are 3, 4, 6 and 2.
no all even numbers apart from 2 are not prime numbers :)
Yes. Apart from 2, all prime numbers are odd.
No - co-prime numbers are pairs of numbers which share no positive integer factors apart from 1. Twin prime numbers are a pair of prime numbers with a difference of 2.
Apart from 2 all even numbers are composite numbers because they have more than two factors.