What breaks yet never falls, and what falls yet never breaks?

In which direction should the missing arrow point?

What has one eye, but can’t see?

Find a 9-digit number, which you will gradually round off starting with units, then tenth, hundred etc., until you get to the last numeral, which you do not round off. The rounding alternates (up, down, up ...). After rounding off 8 times, the final number is 500000000. The original number is commensurable by 6 and 7, all the numbers from 1 to 9 are used, and after rounding four times the sum of the not-rounded numerals equals 24.

What question can you never answer yes to?

A prisoner is told: "If you tell a lie, we will hang you and if you tell the truth, we will shoot you." What did the prisoner say to save himself?

In this image, you can see three almost identical Doraemon images. Can you spot the odd one out from them?

I am the beginning of everything, the end of everywhere. I'm the beginning of eternity, the end of time and space. What am I?

I never stop running even when I standstill. If I am formed by joining two identical bodies together, can you guess who I am?

Railroad Crossing, look out for the cars. Can you spell that, without any R's ?