Buy me, smell me or deliver me, I do not change.

Who am I?

How is the moon similar to a dollar?

I live in a bowl. I can swim. I have a tail. I also have fins and big eyes. What am I?

Which is the rope you never skip with?

I am a five-letter word under you,
Remove the first letter and I am above you,
Remove the second as well and I am around you.

Who am I?

When I got four, I have it none.
When I got two, I have it some.
When I got none, I have it all.

What is it?

2, 3, 5, 9, 17, _ What is the next number in the sequence?

I was born in a small house and I live in it all alone. No windows and no doors have been assigned to my house. The only way I can go out is by breaking through the walls of my house.

Who am I?

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?

A time long back, there lived a king who ruled the great kingdom of Trojan House. As a part of the renovation of the kingdom to meet future security needs, he asked his chief architect to lay down a new play in a manner that all of his 10 castles are connected through five straight walls and each wall must connect four castles together. He also asked the architect that at least one of his castles should be protected with walls. The architect could not come up with any solution that served all of King's choices, but he suggested the best plan that you can see in the picture below. Can you find a better solution to serve the king's demand?