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?

I have one of the three numbers: 1, 2, or 3 in my mind. I speak only truth. You can ask me just one question for which I will only reply in yes or no or don't know. What question will you ask from me so that you are able to know the number?

Using Only Five 5's and any mathematical operator make sum as 37

A wooden log balances equally on the scales when weighed with three-quarters of a pound and three-quarters of a wooden log.

Can you calculate the weight of the entire wooden log?

What you cannot hold but it is yours?

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

Find the value of "?" in the ball picture Riddle below:

How many pluses should we put between the digits of 987654321 to get a total of 99, and where?

A man was going to bleach his socks because they had gotten muddy the day before. As he was pouring the bleach into the washing machine, he spilt some on the floor. He got some cleaning fluid and mopped it up with a rag. Minutes later he was dead. What killed him?

Spelt forwards I’m what you do every day, spelled backwards I’m something you hate. What am I?