Translational Kinetic Energy Practice Test

Two spheres roll without slipping, but consider only their translational kinetic energies. Sphere 1 has mass $m$ and center-of-mass speed $2v$. Sphere 2 has mass $2m$ and center-of-mass speed $v$.

Which has the greater translational kinetic energy?

Two objects move in the same direction on a horizontal surface. Object A has mass $m$ and speed $v$. Object B has mass $3m$ and speed $\tfrac{v}{\sqrt{3}}$.

Which object has the greater kinetic energy?