Q: Two twin sisters were taken to the doctor's office by their parents. It turned out that Mary had hemophilia while Ann didn't have any blood disease. Which sister had blood that was able to clot?
A: Ann

Q: The police arrested two homeless people. James was 35 and had been HIV positive for 20 years, and Bill, who was 54 and was not HIV positive. They booked them and let them go. Which person didn't have a disease that causes death?
A: Bill

Q: Bill and Chris are passionate entomologists. Bill knows everything there is to know about most ants except the Leafcutter ants. Chris studied Leafcutter ants extensively and exclusively for years now. They are good friends and exchange ideas often over a pint of beer. Which friend studied more about fungus eating ants?
A: Chris

Q: Two brothers were born 20 years apart. Tom, the older brother, was 72, while Dan was 52 years-old. they got along pretty well. Which brother didn't experience a decline in strength?
A:
Dan