I do 150 3 reps per set and I do 5 sets intotal I do 15 reps from each 5 sets I did that consist of 3 reps per set. Ive been told this is a bad wokrout for your chest and I do this every other 3 days mon, wed, friday. Should I drop the weight? Or keep at it ?

If you're looking for strength I see nothing wrong with what you're doing, if you're going for size, than raise the reps to 10, and lower the weight.

I would change it up almost everytime. Sometimes more reps or less and sometimes more sets or less and change up the weight.

that made no sence to me.. you do what? :S

haha im having problems understanding too? I started at 3X10 then lowered weight went to 4x8 then stuck with it till i was where i wanted to be..i needed str fast so i did 5x5 for about 2 months started at 230 and got to 245. for 5x5 id suggest that for str but, again it all depends on what u want!

I wanna gain size and cuttness so will that be 5x5 5 sets and 5 reps?

wow goldy i love your math lol. Like others have said, if you are trying to gain size try like 3 sets of 8-12 reps. Its really that simple.