Looks like two cockerels and a pullet to me. Two with much larger combs. I would try to get a picture where their crest is not wet, so that we can see if their crest is "poofy", "swept back", or if there are "streamers".
The first is definitely a cockerel and the last two are pullets. Male partridges tend to have more red, and the last two have more female-type coloring. Of the others - not quite sure! If you post pics of their combs it might help. My guess (which definitely could be wrong!) would be: #2...
Too soon, but I would lean slightly more towards male because of comb.. maybe?! Since it doesn't have much of a crest, this could, however, be normal comb development for both males and females of this breeding.
Can you take more pictures of their heads/combs? Straight-on? It is still a little early to tell for sure, but sometimes you can distinguish based on size of comb. Both seem to have the swept-back crest that I tend to associate with males.
I don't think that this is necessarily true for Silkies, but can be a possible indication in other breeds. I usually go by overall appearance (how they hold themselves), comb development, and if their crest is round or slicked back.