What is the next number in this series?

4,12,84,3612....

If 1+9+8=1, what is 2+8+9?

What does below chemistry rebus means?

The person who makes it has no need for it; the person who buys it has no use for it. The person who uses it can neither see nor feel it. What is it?

All of the flowers I have are orchids except two. All of the flowers I have are hibiscuses except two. All of the flowers I have are roses except two.

Can you tell me how many flowers I have?

What does the below rebus riddle means?

What kind of storm is always in a rush?

How can you tell a raw egg from a hard-boiled egg?

How can you drop a raw egg from a height onto a concrete floor without cracking it?

A dying old man wants to divide his entire land between his only two sons. Since his only wish is to treat them as equal as both of them have been too good to him, he wants to divide his land equally between them. The problem is that the land is significantly irregular in shape and thus there is no choice of cutting them into two equal halves.

Can you help him divide the land in a manner that both of his sons will be happy?