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

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

Can you make numbers like 24, using numbers 3,3,7 & 7 with any arithmetic operator?

What does man love more than life, and hate more than death or mortal strife; that which satisfied men want; the poor have, and the rich require; the miser spends, the spendthrift saves, and all men carry to their graves?

You can see it everyday, But cannot touch it at will. What is it?

Two friends decide to get together; so they start riding bikes towards each other. They plan to meet halfway. Each is riding at 6 MPH. They live 36 miles apart. One of them has a pet carrier pigeon and it starts flying the instant the friends start traveling. The pigeon flies back and forth at 18 MPH between the 2 friends until the friends meet.

How many miles does the pigeon travel?

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

I live in a bowl. I can swim. I have a tail. I also have fins and big eyes. What am I?

Why do you find that most of the buildings are deprived of the 13th floor?

What has one letter and starts with an E?

The answer I give is yes, but what I mean is no. What was the question?