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

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

I have Rs.50 and I spend it in the way as below.

I am a type of vehicle that has two wheels and is powered by humans. What am I?
Hint 1: You can ride me for exercise.
Hint 2: I am environment-friendly.

why number 8549176320 is one of a kind?

What work can one never finish?

Solve the counting riddle by identifying the number of triangles in the given picture.

Replace the question mark with the correct number.

What can jump higher than a building?

A bag contains 64 balls of eight different colours. There are eight of each colour (including red). What is the least number you would have to pick, without looking, to be sure of selecting 3 red balls?

I am eight letters long - "12345678"
My 1234 is an atmospheric condition.
My 34567 supports a plant.
My 4567 is too appropriate.
My 45 is a friendly thank-you.
My 678 is a man's name.

What word am I?