What word begins and ends with an E, but has only one letter?

Twice ten are six of us,

Six are but three of us,

Nine are but four of us;

What can we possibly be?

Would you know more of us?

Twelve are but six of us,

Five are but four, do you see?

What are we?

On her drawing table, Sayna lit 12 coloured candles. A few seconds later she blew two candles off.

How many candles Sayna have at the end?

I live in a bowl. I can swim. I have a tail. I also have fins and big eyes. What am I?

How can you take 2 from 5 and leave 4?

If six children and two dogs were under an umbrella, how come none of them got wet?

Known by all without exception, Forever here, for your protection, Sometimes strong, sometimes weak, Right after the night I come - hot and chic. And while millions of miles away, I always get to you, I find my way. No life around could do without me, Can you guess what I might be?

How many letters are in the alphabet?

The more you take me, the more you leave me behind.
Who Am I?

The more of this there is, the less you see. What is it?