2. Surgeon is female. Sexism lives still.
3. It's daytime.
4. Kerry was born a little before midnight on February 28 of a non-leap year and Terry just after midnight, ie on March 1. This year is a leap year, hence February 29 intervenes, so that their birthdays are 2 days apart.
5. This is logical rather than lateral, but it is a good puzzle which can be solved by lateral thinking techniques.
A square cover will only fit in one of four orientations.
A round manhole cover cannot fall into the manhole.
6. It was he who poisoned the punch (after drinking some).
7. No navels.
8. They are the two survivors of a set of triplets.
9. Cure for hiccups.
10. They arrived at opposite banks.
Another answer is that the first man crossed over, returned and then the second man crossed.
11. Equal. Any tea in the coffee cup must have come from the tea cup. Since there is the same amount of liquid in both cups, it follows that as much tea went into the coffee cup as vice versa.
12. Turn on two of the bulbs for ten minutes, then turn off one of these and turn on a third bulb. When you go into the other room, temperature and light will tell you which is which.
13. White. If the first and second people both had black hats then the third person would know their own hat. So if the first person wore a black hat then the second would know that their own hat was white.
14. Nothing.
15. "My father's son" is the speaker. Since that is the father of "that man" it follows that the speaker is referring to his son.
16. Ask, "What gate would the other gate-keeper say leads to Heaven?"
17. There is no reason to add what the three guys paid to what the bellhop kept and expect it to add up to $30 or anything else. One is an outlay, the other an earning, and there is no point in adding the two.
18. The plane was flying upside down.
19. "NOON". If you don't believe me then stand on your head as your read this.
20. In a pentagram.
21. I The bucket has a lid.
II The man is underwater.
III He is in outer space.
IV He is in free-fall.
V He is swinging the bucket.
VI It was upside-down in the first place.
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