Find The Next Number In The Sequence

30 10 15 13 0 16 -15 ?

You have two buckets of 11 liters and 6 litres.
How can you measure exactly 8 litres?

If 24H in a D => 24 hours in a day.
What does "64S on CB" stand for?

I am the black child of a white father, a wingless bird, flying even to the clouds of heaven. I give birth to tears of mourning in pupils that meet me, even though there is no cause for grief, and at once on my birth, I am dissolved into air. What am I?

First, think of the colour of clouds. Next think the colour of snow. Last, think of the colour of the moon. Now, what do cows drink?

Before the start of the car race, John and Jacob have the same amount of fuel in their car. With this fuel, John can drive for 4 hours while Jacob can drive five hours.
After a time they realize that the amount of fuel left in John's car is 1/4th of the fuel in Jacob's.

For how long they are racing?

Complete the given grid with valid words. You can only use the letters AAEEIIMMPPTT.

Hint: The grid reads the same across as down.

That attorney is my brother, testified the accountant.

But the attorney testified he didn't have a brother.

Who is lying?

I am a white box having no key or lid.
Yet there is a golden treasure inside it.

What Am I?

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