Good Riddles

Question: I cannot speak but i tell everything.Im not a tree but i have a leaves. I have hinges but neither not a door nor a window. Who am i?

Question: Farrah left her key under the mat and when she came back she lost it.The painter said he painted the wall ,the security said she didn't know, annd the janitor said he cleaned the floor. Who took the key?

Question: I can be seen and heard miles away, only show my position for a couple of seconds, but if touched it can kill you instantly.

Question: If the ends justify the means, then what may be said about social media?

Question: There are 4 tea cup (you must say 4 tea cups as in 40 cups) 3 fall down and smash how many are left