Find The Next Number In The Sequence

30 10 15 13 0 16 -15 ?

A man has to get a fox, a chicken, and a sack of corn across a river.

He has a rowboat, and it can only carry him and one other thing.
If the fox and the chicken are left together, the fox will eat the chicken.
If the chicken and the corn are left together, the chicken will eat the corn.

How does the man do it?

Can you name an animal whose killing cannot be performed without spilling your own blood?

I am the beginning of the end, and the end of time and space. I am essential to creation, and I surround every place. What am I?

Can you name any English verb that becomes its past tense by simply rearranging the alphabets ?

Christina, Allison and Lena are 3 daughters of John a well-known Mathematician, When I asked John the age of their daughters. He replied "The current age of her daughters is prime. Also, the difference between their ages is also prime."

How old are the daughters?

What begins with T, ends with T, and has T in it?

Rectify the following equality 101 - 102 = 1 by moving just one digit.

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

You have to fill the below given grid in a manner that every row and column contains the digits 1 to 6. Also, make sure that the squares that are connected with each other must contains the same digit.