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

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

Two Twins Jack and Jill were standing back to back and suddenly they started running in opposite direction for 4 kilometres and then turn to left and run for another 3 kilometres.

what is the distance between the Baggio twins when they stop ?

He digs out tiny caves and stores gold and silver in them. He also built bridges of silver and made crowns of gold. They are the smallest you could imagine. Sooner or later everybody needs his help, yet many people are afraid to let him help them. Who is he?

Can you write down eight eights so that they add up to one thousand?

Can you name an animal whose killing cannot be performed without spilling your own blood?

who is silent in the parliament?

In a guessing game, five friends had to guess the exact numbers of apples in a covered basket.
Friends guessed 22, 24, 29, 33, and 38, but none of the guesses was correct. The guesses were off by 1, 8, 6, 3, and 8 (in random order).

Can you determine the number of apples in a basket from this information?

I am the beginning of the end, and the end of time and space. I am essential to creation, and I surround every place. What am I?

Alpha is Beta's sister.

Gamma is a Beta mother.

Delta is Gamma's father.

Tango is Delta's mother.

Then,

How is Alpha related to Delta?

A certain street contains 100 buildings. They are numbered from 1 to 100. How many 9's are used in these numbers?