Question

Which of the following items is the most likely to have the mass of 3mg. A cat, Pumpkin, ant, or a piano

Answer 1

ant because milligrams are the smallest unit

Answer 2

One mg. is equal to 2.2 pounds. It will depend on the size of each object.
Using the process of elimination I would say that:
-It definitely isn't an ant (too light) or a piano (too big)
-This leaves a cat or a pumpkin.
Hope this helps.