Short Riddles and Answers

Question: While the barracuda uses opportunity and speed to prey on other large fish, it has little interest in humans. Barracuda attacks on humans are rare; but when they do, what is the reason?

Question: I'm number three.
But I'm not a number.
I'm hot and cold at the same moment but not at the same time.
I'm number three.
But I'm not a number.

Who or what am I?

Question: From a Bishop to a redhead Or an elf to an Inca From solitary to shy From green to purple Or Garnet to wood From glossy to magnificent Even a fish to a rhinoceros.... What are they?

Question: Six glasses are in a row. The first three are filled with milk and the last three are empty. By moving only one glass, can you arrange them so that the full and the empty glasses alternate?

Question: It dances and skips,
it's read in the eyes but it cheats with the hips,
If it meets its match it's easily caught,
but it's worth nothing if it is bought.
What is it?