this is a math riddle would really appr. any help
2007-02-27 08:42:40 · 4 answers · asked by don c 1 in Science & Mathematics ➔ Other - Science
put all 12 bowls on the scale
Take one off at a time
calculate the difference in weight each time
this way you will figure it out and will only have put anything on the scale 1 time
...however i'm not sure what it totally meanys to use the scale 3 times......but there is a possibility
2007-02-27 08:49:20 · answer #1 · answered by jcss_003 5 · 0⤊ 0⤋
Place all of the bowls onto the scale, note the weight. Remove one at a time and note the difference in the weight. When you pull the bowl that differs from the other weights, that is the bowl you want. This solution assumes that use would mean placing and object on the scale, noting the weight, then removing it.
2007-02-27 16:52:28 · answer #2 · answered by metalman31 2 · 0⤊ 0⤋
step 1. place four bowls on each side of the scale; if they ballance (A), mark the other four '?'.
If they do not balance (B), mark four 'L', and four 'H' (according to the scale).
step 2(A). weigh three '?' against three '=' bowls;if they are equal the other one is the odd bowl (weigh it against a normal bowl to see if it is heavy or light. If they do not balance mark the three bowls 'H', or 'L' as the scale indicates.
step 3(A). weigh one of the three remaining bowls against another, if they balance the other one is the odd bowl; if they do not balance the designation of 'H', or 'L' from step 2 will indicate which bowl is 'odd'.
step 2(B). weigh three 'L' bowls and three 'H' bowls against six '=' bowls; if they ballance the odd bowl is one of the two others (C); if they do do not ballance the odd bowl is one of the three 'H' bowls, or one of the three 'L' bowls as the scale indicates heavier than = or lighter (D).
step 3(C). weigh the 'H' bowl against an '=' bowl; if they are equal the odd bowl is the 'L' ball; if they are not equal the odd bowl is the "H" bowl.
step 3(D). weigh one of the three 'suspect' (either the three 'H' bowls, OR the three 'L' bowls from step 2) bowls against another; if they are equal, it is the other one; if they are not equal the scale will indicate which one it is according to its label.
Good luck!
2007-02-27 17:15:00 · answer #3 · answered by p_rutherford2003 5 · 0⤊ 0⤋
Put six on each side - take the heaviest six and put three on each side - take the heaviest three and put one on each side...if they are equal, then the remaining one is different.
2007-02-27 16:46:27 · answer #4 · answered by Anne 4 · 3⤊ 0⤋