Answer:
When is 1500 plus 20 and 1600 minus 40 the same thing?
There's one in every deck of cards and in a famous movie
What falls down but never gets hurt?
Mostly worn by women or girls, this is sometimes shiny like silver or gold, and sometimes it is made of pearls.
Often found in doctor's offices and pirate flags
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.