Hold'em table

QJs suited is a strong button hand; raising for value and position with 100bb stacks 3-handed.

J7 offsuit is a weak hand facing a raise from the button; folding avoids committing chips with poor equity.

T7 offsuit is too weak to call a 3x button open out of position; folding avoids a dominated, low-equity spot.

AJ offsuit on the button is a strong hand to raise for value and take initiative against blinds.

K3o is too weak to continue against a button raise to 3bb with the big blind still to act.

I only need ~31% equity to call 200 into a 450 pot, and Q7o has roughly 43-45% against a wide 3-max button opening range, so defending the big blind is marginally profitable even out of position. Three-betting this weak hand would just build a pot OOP with a dominated hand.

I flopped top pair with a weak kicker (Q7) out of position against the preflop raiser. Checking keeps the pot small and lets me evaluate their aggression rather than donk-betting into a strong range.

I have AJ with an overcard and gutshot-ish backdoor equity; opponent checked flop showing weakness, so a continuation bet on the dry Q94 board is likely to take the pot.

I hold top pair with a weak kicker (Q7), which is behind most of a preflop-raiser's continuing range. Checking keeps the pot small, gives me a free card if checked through, and avoids building a pot out of position with a marginal hand.

I have only ace-high with no draw; opponent has shown willingness to call, so bluffing further offers little value and I should control pot size.

I have only ace-high with no pair, and villain has shown passive action; betting here offers little value and risks a raise, so checking back is best.

K4o is too weak to open from the button in a three-handed pot; folding avoids playing a dominated king out of position relative to likely continuing ranges.

Pocket sevens heads-up against only the BB is well ahead of a random hand; a standard 3x raise builds the pot with position disadvantage but strong equity.

Q9 offsuit is weak facing a 3x raise heads-up out of position; not worth continuing given the small pot.

Pocket queens is a strong hand heads-up against the big blind; raising for value to build the pot.

Q3o is too weak to continue against a 3.5bb open after the button folds; calling 250 into 450 is not justified.

J4 offsuit is a weak hand from the button facing a raise indication; folding preserves chips for better spots.

86o is too weak to complete or raise out of position against the big blind after the button folded, so I give up the small blind rather than invest more.

Suited connector on the button is worth a small open in three-handed play; 2.5bb keeps the price reasonable while taking initiative.

2s3s is the weakest suited hand, and I'd be out of position against both the button raiser and the big blind postflop. Calling 200 more for a dominated speculative hand is -EV, so folding is the cheapest line.

2h9h offsuit is weak, facing a raise from the button with only marginal equity; folding preserves chips.