What does below Rebus mean ?

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A man dies of old age on his 25 birthday. How is this possible?

Can you write down eight eights so that they add up to one thousand?

Can it be possible to build a house that has all its four walls facing towards the South?

Can you replace the question mark with the correct number in the below table sequence?

Replace the question mark with the number below given a simple math problem.

I have nine bottles of wine and one of the nine bottles is poisoned.
I need to find the poisoned bottle with two facts
(1) Poison is deadly, only a sip will cost death
(2) I have two mice to do so.

How should I do it?

In the four images below, can you find the odd one out?

It can't be seen, can't be felt, can't be heard, and can't be smelt.
It lies behind stars and under hills, And empty holes it fills.
It comes first and follows after, Ends life, and kills laughter.
What is it?

Keyboard words are not in alphabetical order, Why?