It's a 7-letter word.
If we remove 1 letter from it, it remains the same.
If we remove 2 letters from it, it remains the same.
If we remove 3 letters from it, it remains the same.
If we remove all the letters from it, still it remains the same.
What is it?

Complete the table series riddle by finding the number that can replace "??".

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.

Replace the question mark with the number below given a simple math problem.

Many have heard it, but nobody has ever seen it, and it will not speak back until spoken to. What is it?

What is black when you buy it, red when you use it, and gray when you throw it away?

I have no doors but I have keys, I have no rooms but I have space, you can enter but you can’t leave! What am I?

Luis Garavito killed Density x Volume.

Who is Luis Garavito ?

You can see three almost identical images below. Can you spot the odd one out from them?

I throw two dice simultaneously.

What is the probability of getting a sum as 9 of the two numbers shown?