Always in you, Sometimes on you;

If I surround you, I can kill you.

What am I?

If it took eight men ten hours to build a wall, how long would it take four men to build it?

Look at the below sequence of letters and tell us what the next letter should be:

O T T F F S S ?

Can you name any English verb that becomes its past tense by simply rearranging the alphabets ?

Which digit occurred maximum times between the number 1 and 1000?

A family is trapped in a jungle. There is a bridge which can lead them to safety. But at one time, the bridge can only allow two people to pass through. Also, all of them are afraid of the dark and thus, they can't go alone.

Father takes 1 minute to cross, the mother takes 2 minutes, the son takes 4 and the daughter takes 5 minutes. While crossing the time taken will be according to the slower one. How can they all reach the other side in the minimum possible time?

Do you know of a place where the wind blows south and then suddenly shifts direction towards the north?

A generous owner of a company decided to give a bonus of $45 to every man and $60 to every woman on his birthday. But only one-ninth of the men and one-twelfth of the women were present to take the bonus.

Can you calculate the amount of money the owner spent if there were 3552 employees?

If your uncle’s sister is not your aunt, what relation is she to you?

I have a five and a three-gallon jar. Assuming there is an infinite supply of water, how can I measure one-gallon water?