Name a key which is hardest to turn.

What can run but never walks, has a mouth but never talks, has a head but never weeps, has a bed but never sleeps?

I make a loud sound when I’m changing. When I do change, I get bigger but weigh less. What am I?

A thief enters a store and threatens the clerk, forcing her to open the safe. The clerk says, “The code for the safe is different every day, and if you hurt me you’ll never get the code.” But the thief manages to guess the code on his own. How did he do it?

Manish has to secure 40% marks to pass his B.tech final exams.
He got just 40 marks and failed by 40-marks.

What is the maximum marks?

If you’ve got me, you want to share me; if you share me, you haven’t kept me. What am I?

Solve this riddle by finding the odd one out from the rest.

You’re out on the water and see a boat filled with people. You look away for a second and look back again, but this time you don’t see a single person on the boat. Why? Hint: The boat did not sink.

What do you answer even though it never asks you questions?

Is the statement valid that it does not matter how much older a sibling is, eventually the younger one will be half as old as the older one?