[molotom]

When you have QT on a Q855A board, on the river you discuss at length the likelihood of him holding Q9, QT, QJ, QK etc, and how you might play QK/QJ differently, but these hands are identical here since they all play QQ55A.

With the A4s, I think you have to bet the turn, I think it's unlikely that the CO/BTN would've check behind an ace on the A72 twotone flop, it's feasible that the 2nd guy to act might've checked his ace on the flop, but he wouldn't check again on the turn. Once CO bets and BTN calls, I would c/r, you are surely ahead (especially of BTN, checked behind flop then just called turn) but they could easily suckout with their draw/weak pair on the river.