19262 Players currently online!
Man vs. Machine - good luck!
Turn-based games at any time!
Vote for the best move to win!
Do you have what it takes?
Sharpen your tactical vision!
Get advice and game insights!
Learn from top players & pros!
View millions of master games!
Your virtual chess coach!
Perfect your opening moves!
Test your skills vs. computer!
Find the right private coach!
Can you solve it each day?
Bring it all together!
Beginners, start here!
Make friends & play team games!
News from the world of chess!
Search all Chess.com members!
Find local clubs & events!
Who's the best of your friends?
Read what members are saying!
the sign said H p z u u l q l
Nothing - signs can't talk.
In Gil-Gandel's problem the answer is any integer up to 40g. If it balances with the 1g, it is one gram. If it balances on the same side as the 1g while opposite the 3g, it is 2g. 3 and 4 are obvious, 5 balances 9 on one side with the 1 and 3 on the other. This can be followed for any number up to 40. For example, if the weight is 32g, it will balance with 27g and 9g on the opposite side, and 3g and 1g on the same side
Yes, and you can extend this indefinitely with powers of 3 (as ajttja realized).
I repeat the correct answer: he can weigh 40 different weights. :-)
06-jwagg and ajttja gave the good explanations, though the wrong answers.
It means the sign maker is an alcoholic and the person who bought the sign will be searching for someone else to do it in the future.
Is the old man with a cat right?
Reproduction and Real Jaques of London Chess Set
by rcmacmillan a few minutes ago
Do You Try to Draw as Black on Principle?
by FirebrandX a few minutes ago
Is 1.e4 c5 2.f4 that bad?
by Blackfoxx 4 minutes ago
People who play for free and complain
by richb8888 4 minutes ago
5/25/2015 - Mate or Queen
by KNIGHTHORSE6729 6 minutes ago
by shaun 8 minutes ago
What is going on with the Chess Cafe?
by rcmacmillan 19 minutes ago
Are all chess players insane?
by RonaldJosephCote 22 minutes ago
QGD marshall defense
by Die_Schanze 31 minutes ago
Beautiful games resulting from unsound openings.
by melvinbluestone 34 minutes ago
Why Join | Chess Topics |
Help & Support |
© 2015 Chess.com
• Chess - English
We are working hard to make Chess.com available in over 70 languages. Check back over the year as we develop the technology to add more, and we will try our best to notify you when your language is ready for translating!