Find The Next Number In The Sequence

30 10 15 13 0 16 -15 ?

There are two words one resembles the "state of rest" and the other is related to "writing/reading material".

Can you name these two words which also sound similar?

John, a 5-year-old boy, was really fond of the chocolates. He asked his Mother to give him some money to buy his favourite chocolates. His Mother gave him $45. He went to the shopkeeper and asked, "How much is one chocolate for?". The shopkeeper said $3 for one chocolate. Also, if you give me the wrappers of three chocolates, I will give you one for the exchange.
In total, how much chocolate could John eat?

Can you spot the man between the coffee bean in the picture below ?

Our product and our sum always give the same answer. Who are we?

In the following picture, E is going to slide the object down and as per the terrain and the physics, the round object is going to travel all the way till the end. Now, can you analyze who all people will die when it happens?

Three doctors said that Bill was their brother. Bill says he has no brothers. How many brothers does Bill actually have?

I noticed one of the words in the oxford dictionary is spelled incorrectly. What about you?

When I got four, I have it none.
When I got two, I have it some.
When I got none, I have it all.

What is it?

Can you count the number of blocks in the picture below?