What is both possible and impossible at the same time?

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 find the least possible number such that

If the number is divided by 3, it gives the remainder of 1;
If the number is divided by 4, it gives the remainder of 2;
If the number is divided by 5, it gives the remainder of 3;
If the number is divided by 6, it gives the remainder of 4.

Can you identify if it's a murder or a suicide ?

You are on a Boat in the mid of a river. You have two cigarettes with you. One of these two you have to light, how will you light the cigarette?

Solve The below Equation:

ALFA + BETA + GAMA = DELTA

What number when divided in half becomes zero?

What breaks yet never falls, and what falls yet never breaks?

Complete the following series. It.s very logical:

1, 4, 5, 6, 7, 9, 11, __?

I am sure no one can have two things for dinner. what are they?