Question: How to talk but not talk?

Question: I join you in battle, fist clenched tight.
We pound three times with all our might.
If my rival decides he will sign for peace;
I'll crush him, and the fight will cease.
But if he lays his hand down flat;
I'll suffer defeat, that is that.

What am I?

Question: A man was found dead in his study. He was slumped over his desk and a gun was in his hand. There was a cassette recorder on his desk. When the police entered the room and pressed the play button on the tape recorder they heard: "I can't go on. I have nothing to live for." Then there was the sound of a gunshot. How did the detective immediately know that the man had been murdered and it wasn't a suicide?

Question: The first is a sign of something good,
the second says whereto;
the third is vulgar and mean,
the fourth is bound by a ring;
the fifth is the noble one.
Together they all drum.

What are they?

Question: Mary was driving home from the countryside. She stopped by a grocery store to get some food. When she walked out of the store, her car was gone. She called the police right away. The police found her car near the bank and held three suspects. Suspect 1: A chubby man with fitness clothes on. Suspect 2: A woman with money in her hand. Suspect 3: A man with dirt on his pants.