What is both possible and impossible at the same time?

What is the difference between a jeweller and a jailer?

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?

Which English verb becomes past tense just by rearranging the letters?

What's the only room from which no one can enter or leave

Can you solve this picture maths equation?

You need to complete the maze by entering from the entrance marked below in the figure near the yellow circle, bottom left and leaving from the exit point near the green circle, bottom middle.

Rule of Game: You can move only by exchanging green and yellow circles.

what does this picture(rebus) riddle means ?

They do not possess flesh or feathers or scales or bone
But still, they are blessed with fingers and thumbs of their own.

What is the largest number you can write with just 3 digits?