Oh wow, lucky guess!
Well, here's a fairly easy one:
1) When looking in the mirror of Galadriel, Frodo saw only one sunset.
2) Pippin saw only one scene in the Palantir before Sauron's "voice" came.
3) Four Rangers of Ithilien came simultaneously to Frodo and Sam when they were found by the smoke of their fire and taken to stay with Faramir.
EDIT: PS:
Caruso, are you familiar with The Silmarillion and Children of Hurin? I was gonna post a question about the First Age, but I realized that not everybody has read these books, and I wanted it to be fair.