Can you find a pattern and the missing number in the series given below?

100, 155, 258,? , 584, 819.

John drives to his office at 20km/hr. After reaching the office, he realizes that today is a holiday. He went back at an average speed of 30km/hr. Discounting the time spent in the stoppage what was the average speed of his journey?

The ages of a father and son add up to 66.
The father's age is the son's age reversed.
How old could they be?
(3 possible solutions).

My friends called me Iron59 because my parents are a chemist and a mathematician. What is my real name?

What do you answer even though it never asks you questions?

You have 1023 apples and 10 bags. You have to distribute these apples in these 10 bags in any way you choose. But when I ask for a certain number of apples you have to give them in terms of bags without transferring the apples from other bags. How do you distribute the apples?

What are the next two letters in the following series and why?
W A T N T L I T F S _ _

*Hint: Check Puzzle Title

Find the next number in the series

12, 20, 40, 72, 116, 172 ?

By removing one matchstick and adding one matchstick, can you convert the word "ZOO" to an animal name?

What does the below rebus puzzle mean?