26275

I drew some dot diagrams 0f 3,4,5 i took the 5th dot from the 5 and gave it to the 3 so there for you need to times the middle number by 3 so the awnser is twelve.It will either be 2 odds or2 evens and 2 odds make a even add the other even which will make the awnser even. 2 even make a odd add the other odd will make an even.