Question

how is uranus similar to saturn?
they both have 27 moons/satellites.
they both have retrograde rotation.
they both are considered ice giants.
they both lack solid surfaces

Explanation:

Saturn has over 140 moons, Uranus has 27—so the first option is wrong. Only Uranus has retrograde rotation (tilted 98°), Saturn rotates prograde—second option wrong. Saturn is a gas giant, Uranus is an ice giant—third option wrong. Both are outer planets with no solid surfaces, composed of gases/ices.

Answer:

They both lack solid surfaces