Answer:
I walk on 4 legs in the morning, 2 legs at noon, and 3 legs at night. What am I?
When you take away the whole from me there is always some left.
What's 3/7 chicken, 2/3 cat, and 2/4 goat?
What goes through cities and fields but never moves?
I stand in one place yet fill the whole room. I can be filled with molten rock and come in every hue. What am I?
It flows out of the soil, It burns you if it boils, And holds us in its coils, More valuable than gold, As black as it is old.