Full answers for Riddles for Adults Set 2. The surgeon riddle has an explanation that names the assumption directly, because that is the whole puzzle.
What has a spine but no bones?
Answer: a book
The spine of a book is the bound edge that holds the pages together.
What comes once in a year, twice in a week, but never in a day?
Answer: e
There is one E in 'year', two in 'week', and none at all in 'day'.
What can you give away and still keep for yourself?
Answer: your word
You give someone your word, and yet you keep it at the same time.
What has one head, one foot and four legs?
Answer: a bed
A bed has a headboard at one end, a foot at the other, and four legs underneath.
A father and his son are in a serious crash. The father dies at the scene. The boy is rushed to hospital, where the surgeon looks at him and says: I cannot operate on this boy, he is my son. How?
Answer: his mother
The surgeon is the boy's mother. The puzzle only works if you assumed a surgeon must be a man.
What is the one thing that gets sharper the more you use it?
Answer: your brain
A blade dulls with use, but the brain does the opposite and sharpens.