Math Snacks Pearl Diver [patched] < Direct >

But something else was different. On her desk, a small, smooth, gray pebble glowed faintly. She picked it up. It wasn't a pearl. It was a number line, etched in miniature, with a tiny diver at the zero mark.

“To open it,” Gus’s voice crackled through the helmet radio, “you gotta punch in a sequence that equals -8. But you can’t just go straight down. The current will rip you apart. You gotta use the seabed paths—add and subtract your way there.” math snacks pearl diver