Some brain teasers for your decaying brains!!!

1) The Elder Twin--
One day Kerry celebrated her birthday. Two days later her older twin
brother, Terry, celebrated his birthday.
How come?

2) Manhole Covers--
Why is it better to have round manhole covers than square ones?
This is logical rather than lateral, but it is a good puzzle which can
be solved by lateral thinking techniques.
It is supposedly used by a very well-known software company as an
interview question for prospective employees.

3) The Deadly Party--
A man went to a party and drank some of the punch.
He then left early.
Everyone else at the party who drank the punch subsequently died of poisoning.
Why did the man not die?

4) Trouble with Sons--
A woman had two sons who were born on the same hour of the same day of
the same year.
But they were not twins.
How could this be so?

5) The Man in the Bar--
A man walks into a bar and asks the barman for a glass of water.
The barman pulls out a gun and points it at the man.
The man says,
'Thank you' and walks out.

This puzzle has claims to be the best of the genre.
It is simple in its statement, absolutely baffling and yet with a
completely satisfying solution.
Most people struggle very hard to solve this one yet they like the
answer when they hear it or have the satisfaction of figuring it out.
SOLUTIONS:

1) At the time she went into labour, the mother of the twins was
traveling by boat. The older twin, Terry, was born first early on
March 1st.
The boat then crossed the International Date line (or anytime zone
line) and Kerry, the younger twin, was born on February the 28th. In a
leap year the younger twin celebrates her birthday two days before her
older brother..

2) A square manhole cover can be turned and dropped down the diagonal
of the manhole.
A round manhole cannot be dropped down the manhole.
So, for safety and practicality, all manhole covers should be round.

3) The poison in the punch came from the ice cubes. When the man drank
the punch the ice was fully frozen.
Gradually, it melted, poisoning the punch.

4) They were two of a set of triplets (or quadruplets etc.) This
simple little puzzle stumps many people.
They try outlandish solutions involving test-tube babies or surrogate mothers.
Why does the brain search for complex solutions when there is a much
simpler one available?

5) The man had hiccups.
The barman recognized this from his speech and drew the gun in order
to give him a shock.
It worked and cured the hiccups -
So, the man no longer needed the water.

~Unknown