Mass is a measure of the inertia of an object. If an object has more mass, it has more inertia.
(a) Astone has more inertia (than a rubber ball of the same size) because it has more mass tharn a rubber ball of the same size.
(b) A train has more inertia (than a bicycle) because it has more mass than a bicycle.
(c) A five-rupee coin has more inertia (than a one-rupee coin) because it has more mass than a one rupee coin
