Discussion about math, puzzles, games and fun. Useful symbols: ÷ × ½ √ ∞ ≠ ≤ ≥ ≈ ⇒ ± ∈ Δ θ ∴ ∑ ∫ • π ƒ -¹ ² ³ °
You are not logged in.
#1 2010-09-09 02:46:20
- giacat
- Novice
Offline
The most difficult problem in south vietnam 2010
topic: has 23 coins, a fake money (not that heavy or lighter than the real coins remaining)
three times with electronic weight balance (which is clearly the deviation between the two sides, if the left-right worse then the current is positive on balance, slightly longer if the right than left on the current balance of is the number of audio, while two sides are equal, the current balance of 0 degrees. find a counterfeit coin.
#2 2010-09-09 05:51:10
- bob bundy
- Moderator
Offline
Re: The most difficult problem in south vietnam 2010
hi giacat,
So hard. 23 ? If the balance is like the picture below, I can do 12 coins.
Do we know the weight of a real coin?
Bob
You cannot teach a man anything; you can only help him find it within himself..........Galileo Galilei
#3 2010-09-09 16:10:47
- soroban
- Power Member
Offline
Re: The most difficult problem in south vietnam 2010
giacat wrote:
. .
.