There are 10 colored marbles in a bag, some red, some green and some blue. All the marbles feel the same are the same weight, and the bag is not see through. You are not allowed to look in the bag. You are only allowed to pull 1 marble out. How can you make sure it will be a red marble? I'll post a possible solution later if no one gets it. Oh yeah, you can not add anything else to the bag such as red paint.
2006-08-16 07:55:44 · 8 answers · asked by Anonymous in Science & Mathematics ➔ Mathematics
"YOU are only allowed to pull 1 marble out"
Ok, since I am only allowed to pull 1 marble out I'll just ask my mommy to pull out all the ones that aren't red and then I'm in business.
2006-08-16 10:30:20 · answer #1 · answered by Pablo Fanques 3 · 0⤊ 0⤋
Umm. that's the easiest question I've heard.
The red marbles squeak when you squeeze them; the rest do not.
Ok seriously? When you put your hand in to pull out a red marble, you already have a red marble in your hand - therefore you will pull a marble out.. and it will be red... You never said you couldn't add a red marble.
Another solution would be that the red marbles were magnetic and you have a magnet in your hand.
This is really too easy of a question if you ask me :)
2006-08-16 08:07:12 · answer #2 · answered by game buddee 3 · 0⤊ 0⤋
Maybe I am being picky about grammar but you say "How can you make sure it WILL be a red marble?". Paint it red after you pick it out if it is green or blue.
You WILL have made sure it is red.
Otherwise it is a probability question that requires taking one at a time till you have a red marble.
Unless you pour them all out put one red one back in then remove one red marble as instructed.
2006-08-16 08:08:50 · answer #3 · answered by 2J's 1 · 0⤊ 0⤋
make sure the bag contains exactly 0 green marbles, 0 blue marbles, and 10 red marbles.
2006-08-16 08:02:08 · answer #4 · answered by Joe 4 · 0⤊ 0⤋
You really can't unless you can give us more information than what you currently have.
if I were to guess, if the marbles were layered, pick the red one from the layer it is located on.
2006-08-16 08:10:17 · answer #5 · answered by Anonymous · 0⤊ 0⤋
If you use a mirror does that count as looking inside?
2006-08-16 08:15:23 · answer #6 · answered by alethiaxx 3 · 0⤊ 0⤋
Number of red balls divided by total number of balls
i.e. number of red balls divided by 10
2006-08-16 08:06:32 · answer #7 · answered by Amar Soni 7 · 0⤊ 1⤋
cheat and look in the bag!!!
2006-08-16 08:01:07 · answer #8 · answered by Anonymous · 0⤊ 0⤋