I travel all around the world but always stay in the corner. What am I?

Using Only Five 5's and any mathematical operator make sum as 37

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

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.

Find The Missing Number In the Sequence.
6 25 64 ? 32 1

In particular commonwealth games, a female participant won silver and gold medals for a single event.

How can this be possible?

John went to a parrot shop in Mexico, and the parrot owner told him that his parrot is so unique that he repeats everything he hears. John got excited and immediately bought the parrot. John went home and spoke many words, but the parrot does not repeat anything.
He went again to the parrot shop and complaint to the shopkeeper, but the shopkeeper never lied. Explain?

Make a sentence consisting of three words that have the whole alphabet.

Before the start of the car race, John and Jacob have the same amount of fuel in their car. With this fuel, John can drive for 4 hours while Jacob can drive five hours.
After a time they realize that the amount of fuel left in John's car is 1/4th of the fuel in Jacob's.

For how long they are racing?

f you were running a race, and you passed the person in 2nd place, what place would you be in now?