Find The Next Number in this series.
1, 2, 6, 42, 1806 ?

I am the one who remains awake when you sleep. But I need to rest when you awake. Who Am I?

Two batsman each on 94 runs. Seven runs needed to win in last 3 balls. Both make 100*. How?

I welcome the day with a show of light, I stealthily came here in the night. I bathe the earthy stuff at dawn, But by noon, alas! I'm gone.

Replace the letters of words with a number so that the below equation holds true

BASE +
BALL
---------
GAMES
----------

13 decks of cards have been mixed. What is the minimum number of cards that must be taken out from the above-mixed cards to guarantee at least one 'four of a kind?

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?

Can you place six matchsticks in a manner that each of the matchsticks is in touch with the other five matchsticks?

How will you measure 15 minutes using two hourglasses of 7 minutes and 11 minutes respectively?

Eight of us go fourth, not back, to protect our king from an attack. What are we?