Can you place six X (crosses) in below board without making three in a row in any way ?

What has six faces, but does not wear makeup, has twenty-one eyes, but cannot see?

Intelligence Agency need to break the vault but the problem is that they are not able to break the vault.

On the vault, a text is written as:

31 11 33 33 43 45
21 25
31 24 11 31 51 41

To Break the code Intelligence Agency brings a mathematician named Joseph.
Minutes later he deciphers the code.

Whats the code?

Below is the sum of symbols in each row and column in the figure. Analyzing the figure, can you find out the value of the symbols?

What part of Turkey has the most feathers?

It's pretty hard to give up.
If you remove a part of it, you will be left with a bit.
Even if you remove another part, the bit still remains.
Remove one more and it still remains.

What is it?

The first person saw the bridge step on it and crossed,
the second person saw the bridge did not step on it but crossed,
the third person did not see the bridge did not step on it but crossed.
Who are these people?

I am never scared but became petrified and can’t live in a house but would die to make one. What am I?

How many words can a pen with half refill write?

You see a boat filled with people, yet there isn’t a single person on board. How is that possible?