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 want to fill my bucket using both cold and hot water.
I have two taps for both cold and hot water. The hot water tap fills the bucket in exact 6 hours and the cold water tap fills the bucket in exact 4 hours.
I turn both of them simultaneously but I forgot to turn off another tap which removes the water out of the bucket. This tap can empty the bucket in 12 hours.

How Long will it take to fill the bucket?

One is to three as three is to five and five is to four and four is the magic number.
What is the pattern?

1 + 9 + 8 = ?
considering, 28 + 8 + 92 = 10

How many times in a given day, minutes and hour clock comes in a straight line ?

No one wants to have it, but if one got it, he does not want to lose it. What is It?

There is an English word that can be used up to four times in a row without modifying the spelling and form a valid grammatical sentence.

Do you know what word is that?

John has eleven friends. He has a bowl containing eleven apples. Now He wants to divide the eleven apples among his friends, in such a way that an apple should remain in his bowl.
How can He do it?

What do you see in the image below

I am lying and I always lie. Tell me whether I am lying or telling the truth.