If you say my name, I will no longer exist. What 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?

You may enter, but you may not come in. I have space, but no room. I have keys, but open no lock. What am I?

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?

If an electric train is travelling south, then which way is the smoke going?

There are five vowels (a, e, i, o, u) in the English language.
Can you tell us a word that contains all these vowels?

If I remove one from eleven it becomes Ten and if I remove one from nine also becomes Ten. How?

What jumps when it walks and sits when it stands?

Give it food and it will live; give it water and it will die.

O_er_t_o_

Complete the missing letters of the given word.