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

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

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

The first two letters signify a male, the first three letters signify a female, the first four letters signify a great, while the entire world signifies a great woman. What is the word?

1. What does:
TIM JOB
represent?

2. What does:
MO_ _
represent?

When I go in I might cause pain. I cause you to spit and ask you not to swallow. I can fill your hole. What am I?

What makes this number unique: 8,549,176,320?

I can be cracked, made, told, and played. What am I?

A deaf and mute man goes to the train station. Tickets for the train are 50 cents each. The man goes to the ticket booth and hands the man inside just a dollar. The man in the booth hands him two tickets.

How did the man in the booth know to give him two tickets without even looking at him?

Before the start of the car race, John and Jacob have the same amount of fuel in their car. With this fuel, John can drive for 4 hours while Jacob can drive five hours.
After a time they realize that the amount of fuel left in John's car is 1/4th of the fuel in Jacob's.

For how long they are racing?

There is one four-digit whole number n, such that the last four digits of n2 are the original number n