Riddles of What is mine but u can only have it

Using the digits 1 up to 9, two numbers must be made. The product of these two numbers should be as large as possible. All digits must be used exactly once.
Which are the requested two numbers?

Answer

9642 and 87531.
The digits of the requested two numbers obviously form descending sequences. Furthermore, if you have two pairs of numbers with equal sums, the pair of which the numbers have the smallest absolute difference, is the one of which the numbers have the largest product. Using this knowledge, the two numbers can easily be constructed by placing the digits one by one, starting with 9 and ending with 1:

9

8 -> 96

87 -> 964

875 -> 9642

8753 -> 9642

87531
Conclusion: the requested two numbers are 9642 and 87531 (and the product of these two numbers is 843973902).

If you were swimming in the ocean and a big alligator attacked you, what should you do?

Answer

Nothing. There are no alligators in the ocean.

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.

Answer

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.

What is that which, though black itself, enlightens the world without burning?

Answer

Ink.

I am an odd number. Take away a letter and I become even.
What number am I?

Answer

Seven.

What year of this century is the same when its number is upside down? What year of the previous century is the same when inverted?

Answer

1961 and 1881.

I am something all men have but all men deny. Man created me but no man can hold me.
What am i?

Answer

Fear.