[So here we have Luke staring at Thalia, Thalia staring at the beads, and Annabeth probably staring at both of them. What a disaster of a team. Strangely there's only five beads on Luke's necklace in comparison to the ten on Annabeth's necklace.]

That's implying I did my taxes. [He's joking (probably), but hm.] She's got a point though, these definitely look hand-made. [He nods toward the shirt Annabeth's wearing.] That's new though.

[Numbers...] The tax place would make sense because I don't know why our first clue would lead us here. I live here. On the other hand the math kinda checks out.