Question

write 28in terms of multication of prime nos

Answer 1

SEE....... 
Prime are no.s that have no factors other than 1 and the no. itself....
SO, in this case,
2 divides 28,
So, 28 = 2 * 14;
2 divides 28,
Therefore, 28 = 2 * 2 * 7 ...... Now that there is no further Factorization possible...... 
Noting that 1 is not a prime neither a composite......

So, 28 = 2² * 7 is the prime factorization of 28.....
Hope my answer satisfies you... ^_^