math
posted by Praneeith on .
can prime number other than 2 and5 3 apart?
explain

no!
the only prime which is even is the number 2, all other primes are odd
If we add 3 to an odd number we get an even number.
e.g. 7 + 3 = 10 
n and n+3
If n is even (not prime), n+3 is odd
If N is odd, n+3 is even (not prime)
2 is the only even prime number, all bigger ones are divisible by 2.