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?

What is the centre of gravity?

While house hunting in London, I came across a very good leasehold property Discussing the lease the landlady told me:

'The property was originally on a 99 years lease and two-thirds of the time passed is equal to four-fifths of the time to come. Now work it out for yourself and see how many years are to go!

You’ll find me on Mercury, Earth, Mars, Jupiter, Saturn, and Uranus. But never Neptune, or Venus. What am I?

I come in different shapes and sizes.
Parts of me are curved, other parts are straight.
You can put me anywhere you like,
but there is only one right place for me.
What am I?

How can you make the following equation true by drawing only one straight line: 5+5+5=550 ?

I speak without a mouth, and hear without ears. I have no-body, but I come alive with the wind. What am I?

What three numbers, none of which is zero, give the same result whether they’re added or multiplied?

If all Goats are Sheep and all Sheep are Deers, are all Deers Goats ?

What Time Should the last watch show in the below figure?