What brings you down but never up?

Find the last number in the series below:

voN luJ yaM raM ---

You bought me for dinner but never eat me. What am I?

What is in seasons, seconds, centuries and minutes but not in decades, years or days?

When I get multiplied by any number, the sum of the figures in the product is always me. What am I?

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?

How many words can a pen with half refill write?

Move four matchsticks to the below square to form three squares?

I am first found in caves, now prolific online; I am a depiction, a drawing, a symbol, or sign. I will convey whichever mood you could wish; or for that matter, a fist, flask, or fish. What am I?

I have some blue and red sock in my drawer. I have a total of 4 socks. I pick 2 socks and the chance that I get a pair of red socks is 1/2.

What is the chance of picking a pair of blue socks?