Data Sufficiency (DS) | Re: Is v < 0? (1) uvu > 0 (2) v^4 < v

Statement 1
uvu>0 => u^2 x v>0
u^2 > 0, so v > 0 - sufficient

Statement 2
v^4<v
V^4 - v < 0
v(v^3 - 1) < 0
If v < 0, then (v^3 - 1) is also < 0 so this scenario is not possible since their product is < 0
If v > 0, then (v^3 - 1) < 0 => 0 < v < 1 - sufficient that v > 0

Hence each statement is sufficient alone - Answer D

---