You can take four of the five letters out of this word, but the pronunciation never changes. What is the word?

By using 'because' continuously three times, can you make an English statement ?

I am taken from a mine and shut up in a wooden case, from which I am never released, and yet I am used by almost every person. What am I?

Prove that the below maths equation is true.

8 + 8 = 91

John Went to the nearby store in a Mall to buy something for her home. Below is the conversation between the two:

John: How much for the one?
Shopkeeper: It is $2
John: How much for the Eleven?
Shopkeeper: It is $4
John: How much for the Hundred?
Shopkeeper: It is $6.

What is John buying?

You find yourself in a strange place guarded by two guards.One of the guard always say truth while other always lies.You don't know the identity of the two.You can ask only one question to go out from there. What should you ask?

There is a barrel with no lid and some wine in it. 'This barrel of wine is more than half full,' said Curly. 'No it's not,' says Mo. 'It's less than half full.' Without any measuring implements and without removing any wine from the barrel, how can they easily determine who is correct?

John replied, when asked how old he was. In 2 years he will be twice as old as he was five years ago.' How old is he ?

Cristina was born in 1888. She just had her 30th birthday today how did that happen?

What has hands, but can’t clap?