what should i do and how long and how often should I do them for

As of now I only have one 15 pound dumbbell, what exercises or techniques can I use to get the most out of it? If there are any other good ways to strengthen arms or biceps without the use of equipment, that would be appreciated as well.

What are good weight lifting chest exercises to lose man boobs?
I already do bench press a machine, and flys.
I know I should be doing more but I just dont know what is effective.
I already know I should manage my diet so I just want to know the most effective exercises.

Either per pound or for a set of them (I need the highest weighted dumbbell to be at least 40 pounds.

What kind of weight lifting will make my punches faster instead of slowing them down and at the same time ofcourse making me stronger.
Is doing the traditional up to the shoulder and down to the leg standing up motion the right way for what I'm saying?
I already have the weights to use.
So what I'm asking is do I have the right format to gain strength while increasing speed instead of decreasing it.

I am almost 16 and I have a pair of adjustable dumbbells, from 2.5lbs to 40 lbs. I don't want to bulk up too much and just want to build some overall muscle, and no weight loss.
I need dumbbell workout out or weekly routine which I can use to build muscle overall. I can also do bodyweight exercises.
Any information would be beneficial.

i am 14, boy, 125 pounds. i have access to 5,20,30,40 pound dumbbells. i currently do 20 reps of 20 twice a day. is that good? for a standard dumbbell bicep curl?

I am just familiar with dumbbell tricep curls, besides that effective tricep exercises with dumbbells ?

I need to know some really great dumbbell-based bicep exercises.

im a wrestler and i need to gain more muscle outside of lifting. what are some dumbbell workouts? (btw i only have ONE dumbell)