1ステージ10問。8問正解でクリア。
1 → 1A → 2v → 2 → 2A → 3v → 3
5 - 3v = 2A
5 - 3A = 2v
nv = n - 1/3
nA = n + 1/3
7A - 3v
(7 + 1/3) - (3 - 1/3) = 4 + 2/3 = 5v