There was an aeroplane crash, every single person died, but two people survived. How is this possible?

A frog is at the bottom of a 30-meter well. Each day he summons enough energy for one 3-meter leap up the well. Exhausted, he then hangs there for the rest of the day. At night, while he is asleep, he slips 2 meters backwards. How many days does it take him to escape from the well?

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

If you read clockwise, you can form a word by inserting three missing letters in the picture given below. Can you do it?

A King wants to send the diamond ring to his girlfriend securely. He got multiple locks and their corresponding keys. His girlfriend does not have any keys to these locks and if he sends the key without a lock, the key can be copied in the way. How can King send the ring to his girlfriend securely?

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

O T T F F S S ?

A man says, "Brothers and sisters, have I none, but that man's father is my father's son." Who is that man?

If in a code language, DISTANCE is written as IDTUBECN and DOCUMENT is written as ODDVNTNE, the how will THURSDAY be coded as in the same language?

A plane crashed between the border of Mexico and America. Where do you bury the survivors?

What am I?