If the first two stacks you weigh are even you know that the lighter Penny is in the third stack. If they're not, you know which of the two stacks has the lighter penny. Then weigh two pennies from the lighter stack. If they're even, it's the third penny. If not, you'll know which one is lighter. So you only have to weigh twice, right?
I'm eleven hundred and twenty years old! Just gimme a friggin' beer!
Anya ,'Storyteller'
Natter 75: More Than a Million Natters Served
Off-topic discussion. Wanna talk about corsets, duct tape, butt kicking, or physics? This is the place. Detailed discussion of any current-season TV must be whitefonted.
sj - Nov 03, 2016 8:55:25 am PDT #716 of 30002
"There are few hours in life more agreeable than the hour dedicated to the ceremony known as afternoon tea."
P.M. Marc - Nov 03, 2016 8:57:31 am PDT #717 of 30002
So come, my friends, be not afraid/We are so lightly here/It is in love that we are made; In love we disappear
But I bet you killed it at Vocally Self Critical!
Hahahaha! Well, I'm a fucking MASTER at that!
Scrappy - Nov 03, 2016 8:58:08 am PDT #718 of 30002
Life moves pretty fast. You don't stop and look around once in a while, you could miss it.
Glam--you only weigh two of the final three. If one of the two is lighter, then Bob's your uncle. If they are the same, the one you left out is the light one.
Glamcookie - Nov 03, 2016 8:59:40 am PDT #719 of 30002
I know my own heart and understand my fellow man. But I am made unlike anyone I have ever met. I dare to say I am like no one in the whole world. - Anne Lister
sj, thanks, I believe that is just right. There's a reason I was an English major!
lisah - Nov 03, 2016 9:11:06 am PDT #720 of 30002
Punishingly Intricate
Yeah, I'm lucky to be able to understand the answer. UGH things like this make me feel so fucking stupid.
Atropa - Nov 03, 2016 9:14:28 am PDT #721 of 30002
The artist formerly associated with cupcakes.
Logic puzzles like that just stress me out and make me feel dumb. I know they're supposed to demonstrate problem solving skills, but I hate them.
Sheryl - Nov 03, 2016 9:15:44 am PDT #722 of 30002
Fandom means never having to say "But where would I wear that?"
Timelies all!
Sitting in the lobby of the con hotel with a fussy toddler.(he's in the stroller and wants out) Waiting for our room to be available.
lisah - Nov 03, 2016 9:20:29 am PDT #723 of 30002
Punishingly Intricate
Logic puzzles like that just stress me out and make me feel dumb. I know they're supposed to demonstrate problem solving skills, but I hate them.
Exactly. And I feel like I have pretty good skills at actually solving problems. Except when presented with a logic puzzle which makes me feel like I'm defective and lucky to have gotten anywhere in life.
Zenkitty - Nov 03, 2016 9:21:08 am PDT #724 of 30002
Every now and then, I think I might actually be a little odd.
Start with three piles of three and weigh two of them. One will be lighter, or the one that is not weighed will be lighter. Repeat with the three pennies in the lighter stack.
But 3 piles of 3 is nine pennies. The question was about 8 pennies. That technique won't work with 8.
Steph L. - Nov 03, 2016 9:22:23 am PDT #725 of 30002
the hardest to learn / was the least complicated
But 3 piles of 3 is nine pennies. The question was about 8 pennies. That technique won't work with 8.
I was just coming here to post that! I was driving myself nuts trying to figure out how only 2 measurements would work with 8 pennies.