Answer:
I hold two people together but touch only one. What am I?
Adored by few, feared and hated by many. Mistress of the entire universal reason, master in the art of numbers. Some may have solved many of my mysteries, but there are still many of them to find. What am I?
I am a type of cheese made backwards
When you take away the whole from me, there is always some left. What am I?
I am a type of animal that hang out in the mist
I repeat only the last word you say. The more I repeat, the softer I got. I cannot be seen but can be heard. What am I?