2007-01-14 14:28:31 · 7 answers · asked by Anonymous in Science & Mathematics ➔ Mathematics
1. weigh 6 and 6, keep the heaviest.
2. weigh 3 and 3 if equal then switch to the other lightest set of 6 rocks and jump to step 4 (you then know the 12th rock is lighter)
3. otherwise weigh 2 rocks if equal choose the third, else choose the heaviest.
If the heaviest set of rocks from step 1 is weighed in two equal parts, switch to the lightest set from step 1:
4. weigh 3 and 3, choose the lightest
5. weigh 2 rocks, if equal choose the third, else choose the lightest
You can find the different rock in 3 weighing if you made a lucky guess through step 1, 2 and 3 or if your guess was unlucky in 4 weighing through steps 1, 2, 4, 5.
2007-01-14 14:36:32 · answer #1 · answered by catarthur 6 · 0⤊ 0⤋
once you're intense approximately dropping weight, the main valuable way is to extend the intensity of each paintings. Take 40 5/4 to illustrate(it is greater valuable than 60/3 by how) and attempt to extend the intensity a week by slowly enforcing a stroll/run habitual. Jog for a 2 min than stroll for 4, etc., retaining this up for 30 min. a week attempt to extend the quantity of time walking. learn have shown that people who paintings out at greater intensity burn greater energy via the day or perhaps the subsequent from what's talked approximately as the "afterburn" result.
2016-10-19 23:55:38 · answer #2 · answered by ? 4 · 0⤊ 0⤋
Divide 12rocks into 6-6 respectively.
Weight both.Find out which 6 is the heaviest.(Weighed once)
Now get the heavier 6 and split it into 3-3.(Twice)
Find which 3 is the heaviest.
Then now listen carefully,just weigh 2 of them.
If one outweights the other,then it is the different rock.
Else if the 2 of the rocks are of equal weight,then the one that is not weighted is the heaviest.(Thrice)
Weighting it thrice is enough.
2007-01-14 14:37:19 · answer #3 · answered by A 150 Days Of Flood 4 · 0⤊ 0⤋
Your riddle is incomplete, because you have to specify that the scale is a balance scale. You also have to specify if the rock is heavier or lighter. Once you've added those details, an answer can be found.
2007-01-14 14:34:43 · answer #4 · answered by baka_otaku30 5 · 0⤊ 1⤋
What in the world are you trying to ask?
2007-01-14 14:33:49 · answer #5 · answered by Nick R 4 · 0⤊ 0⤋
"weigting" isn't a word.
2007-01-14 14:36:25 · answer #6 · answered by AZSunshinebabe 1 · 0⤊ 0⤋
huh?
2007-01-14 14:31:42 · answer #7 · answered by Bluie, The Big Plastic Whale? 4 · 0⤊ 0⤋