My colleague keeps emailing round logic puzzles, and I normally spend several hours beating my head against the wall trying to figure out how many pirates it will take to extinguish 99 lightbulbs in the given time, using only one match and a banana (or something like that).
I wish to take revenge by setting him a really tough logic puzzle. Anyone know any good ones?
2006-07-05 23:39:41 · 7 answers · asked by Anonymous in Science & Mathematics ➔ Mathematics
You are placed (naked) in a room with nothing but a small pipe cemented in the ground and a ping-pong ball in the pipe. The diameter of the pipe is just small enough that the ball fits in it, but there is less than a mm of space on any side of the ball. The ball is several cm down from the top of the pipe, thus you can not use your fingers to get it out.
You may leave the room, and do whatever you want, but when you come back, someone takes all of your clothes (don't worry, the room is heated), and checks to make sure you are not taking anything extra into the room (full body cavity search).
How do you get the ping-pong ball out of the pipe?
Sucking wouldn't work because there is no way for air to come through the bottom. You could create a vacuum, but nothing would happen, there needs to be pressure from the other side to move the ball.
2006-07-06 00:54:00 · answer #1 · answered by Eulercrosser 4 · 2⤊ 1⤋
answer #a million a set of folk with multiple eye shades live on an island. they are all proper logicians -- if a end ought to correctly be logically deduced, they're going to do it (without delay). So, I say all of them go away the first evening because they knew without delay. OR answer #2 no one leaves. "There are not any mirrors or reflecting surfaces, not some thing dumb. it isn't a trick question, and the answer is logical. It would not remember upon problematical wording or absolutely everyone mendacity or guessing, and it would not contain human beings doing some thing stupid like coming up an illustration language or doing genetics." Emphasis on (guessing) so by using the regulations, who began the ball rolling? someone guessed that they had blue eyes? because the guru is too imprecise. "i am going to make certain someone who has blue eyes." she isn't chatting with one, she is status in the front of the islanders. answer #3 lower back no one left, because they were there many years. why go away? "The Guru is authorized to talk once (enable's say at midday), on in the destiny in all their countless years on the island."
2016-11-01 07:15:04 · answer #2 · answered by ? 4 · 0⤊ 0⤋
1+3+5+.......+19 (totally 10 numbers)=100. Here the sum of the given 10 numbers is 100. Now, choose any Five(5) numbers of the list such that their sum is 50. What are the 5 numbers?
2006-07-06 00:57:35 · answer #3 · answered by K N Swamy 3 · 0⤊ 0⤋
maths fallacies are always fun!!!
I have a book called 'mathematical diversions and problems' (well somethign to that effect) and it has funny fallacies and problems. I'll give you a problem tomorrow from that book (which is upstairs and I am way too lazy to get it now)
hey eulercrosser do you have to pee in the pipe??
anyway: puzzle.
If 1/2x +1/2(1/2x + 1/2(1/2x +1/2(1/2x + ... = y,
then x = ?
2006-07-06 00:00:21 · answer #4 · answered by cool_person 2 · 0⤊ 0⤋
a^b+b^a=732 Find a and b
Ans:731 1 or 1 731
Make 100 by using four 9's
Ans:99+9/9
2006-07-06 01:16:27 · answer #5 · answered by v_aravind_kulasekhar 1 · 0⤊ 0⤋
Here's a couple of websites with a few interesting ones. But perhaps your colleague has been using these sites himself, lol:
http://www.folj.com/puzzles/very-difficult-analytical-puzzles.htm
http://www.rinkworks.com/brainfood/c/logic.shtml
2006-07-06 00:08:00 · answer #6 · answered by Jimbo 5 · 0⤊ 0⤋
I just wanted to answers Eulercrosser's riddle thing...
I think you suck out the ping pong ball...
2006-07-06 06:01:46 · answer #7 · answered by Anonymous · 0⤊ 0⤋