Pullet or roo? Mixed breed chicks

[Luckychickenlady226]

Had some spring chicks and I have no idea how to tell if they are hens or roosters. Anybody want to take some educated guesses?

 

[Rhodebar Lover]

I think silver is a cockerel and gold a pullet

 

[nuthatched]

How old are they? I do see anything that screams cockerel on either of them except the black and white one has thicker legs, which isn't a scientific method but I associate that with boy

 

[Luckychickenlady226]

I’m not sure how old they are at least 4 could be 5

How old are they? I do see anything that screams cockerel on either of them except the black and white one has thicker legs, which isn't a scientific method but I associate that with b