Find The Next Number In The Sequence

30 10 15 13 0 16 -15 ?

You have a 12 liters jug full of water. You have two empty 8 liters and 5 liters jug. How can you divide the water into two equal parts using these jugs?

What type of tree can I carry in my hand?

A Doctor always sneezes before the rain. Doctor sneezes, Will it rain?

Which of the following words don't belong in the group and why?
CORSET, COSTER, SECTOR, ESCORT, COURTS

If you're 8 feet away from a door and with each move you advance half the distance to the door. How many moves will it take to reach the door?

There are 2 people near the river and both of them want to get on the other side. The boat can only take one of them. But they got across.
How?

4 fathers, 2 grand-fathers and 4 sons went to watch the movie.What is the minimum number of tickets they need to buy ?

Akbar summoned Birbal out of anger.
He told him that he will have to face death.
He asked him to make a statement and if the statement is true he will be buried alive and if the statement is false, he will be thrown at lions.
After hearing Birbal’s statement, Akbar could do nothing but smile.
He gave him 5 gold bars and let him go.

What did Birbal say?

A quarter is one-fourth of a dollar but Mr. John has changed the equation as below :

DOLLAR * 4 = QUARTER

Can you replace each letter with a digit to make the above solution correct?