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

If eleven plus two equals one, what does nine plus five equal?

On this table for two, something is missing for the other one. Your task here is to find the food item that does not have its pair on the table.

Can you count the chocolates in hand?

I possess a head

I flaunt a tail

But I don't have mouth or legs

Can you find out who I am?

Readers with high attention to detail can spot the mistake in the stack of shoes in 5 seconds. Are you one of them? Test your visual skills now!

The dirtier I get, the whiter I look. Who am I?

I came first on earth but second on the heaven.
I also came twice in a week but found just once in a year.
I stay away from months but you can find me in February.

What am I?

I am soft and cuddly that soothe your heart. But, If you pick my last name I am going to tear you all apart. Who am I?

I am a type of food that is often found in the fridge and can be white in colour. What I am?
Hint 1: I am a dairy product.
Hint 2: You can spread me on the bread.