Which is the correct shadow of the bird?

How many letters are in the alphabet?

The Puzzle: A girl, a boy, and a dog start walking down a road.

They start at the same time, from the same point, in the same direction.

The boy walks at 5 km/h, the girl at 6 km/h.

The dog runs from boy to girl and back again with a constant speed of 10 km/h. The dog does not slow down on the turn.
How far does the dog travel in 1 hour?

Always in you, Sometimes on you;

If I surround you, I can kill you.

What am I?

I am the beginning of the end, and the end of time and space. I am essential to creation, and I surround every place. What am I?

How can you write nineteen in a manner that if we take out one, it becomes twenty?

How can you take 2 from 5 and leave 4?

I possess a head

I flaunt a tail

But I don't have mouth or legs

Can you find out who I am?

In four steps you need to move the word 'cold' From 'warm' by replacing one alphabet at a time such that every word formed at each step is acceptable in English Dictionary.

Begin with a word, five letters to my name,
Remove the first and last but I am the same
Take out my middle and still, I remain.
What word am I?