Irene killed hundreds of people mercilessly and yet the police were not able to put her behind the bars. Why?

You have two buckets - one holds exactly 5 gallons and the other 3 gallons. How can you measure 4 gallons of water into the 5 gallon bucket?

(Assume you have an unlimited supply of water and that there are no measurement markings of any kind on the buckets.)

On a windy rainy night , I was driving in my car.
When i reach the bus stand , i see three people waiting for the bus.

1. An old lady who needs an immediate medical attention
2. My Best Friend
3. Girl whom i love from childhood

My car is a two seat, so can you tell me , what i have done in this situation ?

What is the coolest letter in the alphabet?

It comprises roots which nobody sees,
Much taller than those trees,
Up and up it goes,
Still it never grows?

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

Who am I?

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?

Which word is least like the others? Third, fourth, fifth, sixth, seventh, eighth, ninth?

I am a type of room you cannot enter or leave. Raised from the ground below, I could be poisonous or a delicious treat. What am I?

I am weightless, but you can see me. Put me in a bucket, and I'll make it lighter. What am I?