What is both possible and impossible at the same time?

What brings you down but never up?

Complete the series by replacing "?" with the correct number.

ST ND RD TH '?'

A 3 digit number is such that it's unit digit is equal to the product of the other two digits which are prime. Also, the difference between it's reverse and itself is 396.

What is the sum of the three digits?

A king sentenced a man to the death sentence for some crime he had committed. Known for his kindness, the king told the culprit that he had a choice to die in a way he decides.

The culprit was clever and said something that saved him from death. What method do you think he must have chosen for his death?

Consider all the numbers between 1 and 1 million. Among all these numbers, there is something very special about the number 8 and the number 2202. What is it?

Replace the question mark with the correct number in below Picture:

Find the missing number in the series below

13 -21 34 -55 ? -144

Find the last number in the series below:

voN luJ yaM raM ---

Can you name an animal whose killing cannot be performed without spilling your own blood?