Question 857901
Do you know what the only even prime number is?  It's 2.  Anything else that is even is divisible by 2.
{{{S/2}}} = the least common multiple of 3 and 5.
What would the lowest multiple of 3 and 5 be?
3,6,,12,15,18,21,24,27,30
5,10,15,20,25,30
Which is lowest? 15
{{{s/2}}}=15
Multiply each side by 2.
S = 30