Find The Next Number In The Sequence

30 10 15 13 0 16 -15 ?

Can you count the number of seconds in a year?

Clue: You need to bother about calculation.

When we see 2 but call 10?

I throw two dice simultaneously.

What is the probability of getting a sum as 9 of the two numbers shown?

A deaf and mute man goes to the train station. Tickets for the train are 50 cents each. The man goes to the ticket booth and hands the man inside just a dollar. The man in the booth hands him two tickets.

How did the man in the booth know to give him two tickets without even looking at him?

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

I have no life, but I can die. What am I?

There are six people in a family namely M, N, O, P, Q and R.

R and O are brother and sister.

N is the brother of Q's husband.
P is the father of M and grandfather of R.

How many male members are in the family?

What Adam and Eve do not have but the rest of the people have?

What has no start, end, or centre?