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

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

What is black when you buy it, red when you use it, and gray when you throw it away?

The more you take me, the more you leave me behind.
Who Am I?

Name the three-letter word that can complete the below words?

A) L O _ _ _ E
B) E D U _ _ _ E
C) _ _ _ E R
D) _ _ _ T L E

Three ants are sitting at the three corners of an equilateral triangle. Each ant starts randomly picks a direction and starts to move along the edge of the triangle. What is the probability that none of the ants collide?

Can you identify if it's a murder or a suicide ?

Open a Laptop which is password protected. Hint for the password is given as below:

1 mobile 3 books 2 Boards 1 night 4 balls 2 lighters 1 ghost 1 hat 3 watches

John can place six large boxes or nine small boxes into a carton.

Can you find out in how many cartons can he place sixty-six boxes in total?

What is the largest amount of money that you can possess in change and still if someone asks you for a dollar, you won't be able to give?

How can you spell "White of an egg" in one word?
Hint: I know you can spell coke, poke, and joke.