Guess the Riddle

I'm not sure if this is a forum related game but it's fun to do. The person who get's the answer right first can post the next riddle. (Just post the answer you think it is below) This first one is one that Shadow told me, don't guess it Shadow, you know the answer.

At 3:00am a mysterious green gas starts filling up a building. The gas doubles in volume every minute. At what time was the building half full?

P.S. If you're wondering, you don't need to know the volume of the building or anything else.

i dont get it.... lol

im guessin, errr
you didnt say what the building is half full of green gas

When half of the people are evacuated from the building?

Hey, I told her this riddle...OK, I'll rephrase it.

One morning at exactly 3 am, a mysterious green gas started coming in from a vent in a building. The green gas doubles in volume every minute, and by 4 am it was completely full. There were no people in the building when this happened. At what time was the building half full of green gas?

Hints: The volume doesn't matter, you don't need to know the volume of the gas or the size of the building.

uhmm 3:30AM?

If it came from a vent then it was already inside the building.

...?

I don't know. Just a shot in the dark.

that doent seem as much as a riddle, more like math

OMG I cannot believe you guys don't get it... answer is 3:59 A.M.

why?

Every minute, the gas takes up twice as much as its current volume. When the building was full at 4 AM, then half of it was there a minute ago leading to 3:59. Am I making any sense? Just think about it. 3:59-half of building/rate- 1 minute = 2x volume/4:00- full

Guess that clears things up.

How is that a riddle?

It's a like one of the word problems you get in math class -.-

Well, Dan's right...And it's a riddle because of the fact you have to think outside the box. Or in this case, maths.

Well, since Blues_gurl can't post till Saturday, I might as well issue the next riddle...

A man is found dead on a field with a package lying beside him. How did this happen?

let me guess......


The package is a parachute and he failed to open it when he jumped off the plane...

Heard this riddle (you left out some details )

I've heard this before too.

You forgot the part that if he opened the package 15 seconds earlier he would still be alive.

the package just flew out of no where , knocking him unconsious

Dan's right.

Next riddle:
A man is driving in a car with no headlights on. There is a black cat in the middle of the road. How did the man know to dodge the cat?

its morning??? lol

The man saw the cats eyes luminate within the darkness so the person doged the cat

It was at day time =P your riddles are too easy!

Tawpa got it right first...Anyway, Dan, I'm only posting easy ones for now. THis is supposed to be Blues_gurl's riddle game, remember? I'm only a substitute. If you want, tawpa or Dan post the next riddle.

dan can post the next one

Since I've been away so long, I'll post two, sort of easy.
There is someone who has their birthday every 4 years, what day is it?
There is a song that can have the same words throughout the whole song, which song is it?

Didn't have time to get better riddles

February 29th
Don't know the second one

BlackMetal got the first one right. Anyway, to make it easier, the second one can have the same words but usually the third line is different.

I'll let you guys get this one. It's kinda hard. Never heard it before and the b-day thing was kinda obvious. Tell me when I can post a riddle.

99 bottles of beer on the wall