Numbers your score measures and have memory down so we'll you can jump to measure number on request
If you're watching the conductor, go be sight, not by sound. Everything's done by sight since the sound can take a fraction of a second to travel. It looks like you will be following the conductor for some places. Make sure you can see them. Go by sight for when you play. It can also help if you don't have to look at the keys at all in some places so you can watch the conductor (but watch without looking like a machine doing a performance watching the conductor). When in doubt, keep the beat steady and adjust. Watch the conductor (unless the conductor is watching you if it's more of a soloist seciton). Everyone else would be doing the same. Then you "just" line the beats up together.
1. The conductor's also a pianist and has the piano part at his fingertips. He could indicate the passage by playing if I really don't recall the measure number.