Question: What is the easiest way to poke a balloon without popping it?

Question: There are 100 passengers boarding a 100 passenger airplane. When passenger 1 gets onto the plane, he is dissoriented, so he randomly picks a seat. Each of the remaining passengers (2, 3, 4, etc.) get onto the plane and take their seat if it is available or picks one of the remaining seats at random if it is not.

What is the chance that the last passenger (passenger 100) will get his seat?

Question: How can you make 7 even?

Question: I am a nice word composed of five letters, but the Romans would call me a numbers.

What am I?

Question: It takes one word to separate them; otherwise they are inseparable.

What are they?