Find The Next Number In The Sequence

30 10 15 13 0 16 -15 ?

There is a unique number which when multiplied by any number from 1 to 6, we will get the new number that contains the same digits only.

Can you find that number?

In the image below, can you find the value of an angle(y)

I don't get anymore wetter, no matter how much rain falls on me.

Queen Elizabeth organised a royal party.

To Avoid uninvited guest royal family set a password.
Jack (an uninvited person) plan to enter the party. He stand nearby the door.

First guest comes, the security person said 'twelve' and guest replied with six.
Second guest comes , the security person said 'six' and guest replied with 'three'.

Jack thought is enough and he walked to the entry point. The security person said 'eight' , Jack replied smilingly 'four'.
He was immediately thrown out of the party. why ?

Solve The below Equation:

ALFA + BETA + GAMA = DELTA

I know a nine-letter word having only one vowel.
Do you ?

why number 8549176320 is one of a kind?

The below mentioned letters have been placed in a order using a logic.

DEAD, BALL, FEAR, SHOP

Can you find the logic?

What you cannot hold but it is yours?