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?

Find the hidden tiger in the given optical illusion ?

Which Burger Is Different in below image?

What's the next in the series?

H, Be, F, S, Mn, Kr, In, Gd, Tl, ?

What is the fewest number of coins that would be required in order to make sure each and every coin touches exactly three other coins?

John and Jacob are twin brothers. One of them is a liar whereas the other one is a truth-teller.

I called their home number and one of them picked up.
I asked. 'Does John lie?' The person replied with a yes.

Whom did I talk with, John or Jacob?

The average age of 10 members of a committee is the same as it was 4 years ago, because an old member has been replaced by a young member. Find how much younger is the new member ?

If six children and two dogs were under an umbrella, how come none of them got wet?

John and Jenni are a married couple. They have two kids, one of them is a girl. Assume safely that the probability of each gender is 1/2.
What is the probability that the other kid is also a girl?

Hint: It is not 1/2 as you would first think.

You have a three-gallon and a five-gallon measuring device. You wish to measure out four gallons.