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

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

A girl says this to her best friend: “I was born in 1955, and I celebrated my 17th birthday last weekend.” Her best friend thinks she’s lying, but she’s actually correct. How is that possible?

I was born in a small house and I live in it all alone. No windows and no doors have been assigned to my house. The only way I can go out is by breaking through the walls of my house.

Who am I?

Using four sevens (7) and a one (1) create the number 100. Except for the five numerals, you can use the usual mathematical operations (+, -, x, :), root and brackets ()

Can you count the number of blocks in the picture below?

By using 'because' continuously three times, can you make an English statement ?

You need to arrange three 7 and mathematical symbols to form number 1?

Until it is measured, not known. Yet how you miss it when it has gone. What is it?

I get hot but I never sweat,
I cook food but I am not a chef,
I have a door but you can't enter me,
I have a light but I am not a lamp.
Who am I?

Which is heavier: a ton of bricks or a ton of feathers?