Good Riddles

Question: A rich man suddenly dies from a cut on his finger. The next day, two men appeared and claimed to be his long-lost son. They both fit the description in the will and had all the necessary documents. The family attorney proposed a blood test. One man agreed while the other point blank refused. The one who agreed was arrested for fraud at once. The second man was accepted as the heir. Why?

Question: What comes up but never comes down?

Question: 8,549,176,320 What makes this number unique?

Question: What noise did the robot bee make whilst making honey?

Question: What cannot be seen or felt, but can only be broken by voice?