When I got four, I have it none.
When I got two, I have it some.
When I got none, I have it all.

What is it?

Rearrange the letters in "new door" to make one word.

There are people and strange monkeys on this island, and you can not tell who is who (Edit: until you understand what they said - see below). They speak either only the truth or only lies.
Who are the following two guys?
A: B is a lying monkey. I am human.
B: A is telling the truth.

You have two buckets of 11 liters and 6 litres.
How can you measure exactly 8 litres?

Can you find out the missing number?

? 4 5 3 5

9 5 7 10 3

If you're 8 feet away from a door and with each move you advance half the distance to the door. How many moves will it take to reach the door?

It's a protector.
It sits on a bridge.
One individual can see directly through it, while others wonder what it hides.

What is it?

what does the below math rebus puzzle mean?

You need to remove two matchsticks to make the below equation true. Can you do it ?

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.