the answer to that is 'lucky!'
Roughly 15 to 18 days
No they don't but they do bleed slightly after initial penetration during their first time mating so if u house a male and female hamster in same cage and u note a tiny trail of blood and no physical body wounds on your hamster it means they likely mated (doesn't necessarily mean they mated successfully to yield pups, so don't pull the male out just yet)
No, it will often take them a couple more times to mate before she becomes pregnant.
Male hamsters have abnormally large testicles anyhow and it should not make much of a difference if they have mated or not. they are simply huge.
no. because the they will fight each other
They will always cuddle up and stay together when they get there food. They won't leave each other.
i also have a winter gold hamster.when it is still small it has golden fur but as it grows older it starts to turn greyish.the reason is probably this that winter white hamster mated wif the hamster that people normally buy.
It's not a good idea to return the baby hamster at any point. If it is a male, they will fight. If it is a female, he will mate with her. Hamsters don't really understand family relationships, so they will just mate with any hamster that is in their territory.
Do not put a female hamster with an already settled male hamster JUST DON'T
So you don't know if the other is a boy? That's kind of impossible... their "parts" are insanely large. Hmm... I guess we'll find out, won't we?
Yes, we do (see http://fr.wikipedia.org/wiki/Hamster).
Well hamster like to run around on there wheel, run in there ball, and play with you ofcourse hamster are nice pets to have and hamster just would like to be loved and will just like to play with you all the time because hamster LOVE company