Kaila looked at her starting depth: . She needed to reach -8 . She swam to the first seabed tunnel, which had a glowing sign: +3 . If she swam through that, she’d go up to -4. Wrong direction. The next tunnel was -2 . From -7, minus 2 is -9. Too deep. The third was +5 , which would send her to -2. Even worse.
The gates came faster. (x=6) – true. 4 = y + 1 (y=3) – true. Then a tricky one: x + x = x (x=0). 0+0=0. True. She almost missed it, but the eel’s eyes narrowed approvingly. math snacks pearl diver
Third gate: (where x = 4). 2 times 4 is 8. True. She swam on. Kaila looked at her starting depth:
Kaila squinted at the flickering screen of her ancient tablet. The game was called Pearl Diver , and it was her last hope. She had been stuck on “The Negative Trench” for three days, a level where the seafloor dropped away into a dark, numbered abyss. If she didn’t retrieve the cursed pearl of Matheos by sunset, her summer scholarship to the Island Academy would be revoked. If she swam through that, she’d go up to -4
“Ah, a new slugger,” Gus grunted, not looking up. “You know the rules. The sea is a number line. The surface is zero. Every stroke upward is positive, every kick downward is negative. The pearl you need is resting at -8.”