9 Gram Marbles Riddle

There are three possible outcomes.

9 gram marbles riddle.

Nine of the bags contains only marbles weighting 10 grams each. Nine marbles you have 9 marbles. The remaining marble is slightly heavier than the others. So let s do this.

You must determine which of the 9 marbles is the heavier one using the balance only 2 times. One of the 12 marbles is irregular but you don t know whether it s heavier or lighte. We put 3 marbles on each pan for a total of 6 marbles on the pan and we leave 2 marbles off the pan. Here are some riddles for you to spend your free time trying to solve.

Here is an interesting riddle involving 12 marbles and a balance scale. 1 you have 9 marbles as seen. 3 you are allowed to use set the scale twice in total. If the number of grams ends in 8 it is the second bag with the 9 gram marbles because 2 times 9 equals 18 and that will be added to the total producing a number ending in 8.

Each pill weighs 10 grams except for contaminated pills contained in one jar where each pill weighs 9 grams. And if the marbles on the scale do not weigh the same then we know that one of the marbles on the scale is the heaviest and we can eliminate the marbles that are not on the scale. 8 of them weigh 1 ounce each. The single 9 shows up as the rightmost digit in the sum of all the weights.

Scale tilts left means the heavy coin is in group 1 2 3 scale tilts right means the heavy coin is in group 4 5 6 scale balances means the heavy coin is in group 7 8 9. You don t know which is which. 1 weighs 1 1 ounce. 2 8 of them are exactly the same weight.

The scales are of the old balance variety. In any case on to the riddle. Each bag has at least 10 marbles in it. To find the contaminated jar follow this step wise approach.

That is a small dish hangs from each end of a rod that is balanced in the middle. Lets start as always by numbering them 1 to 9. In other words you get to take 2 measurements or comparisons here. Put 1 2 3 on the left side and 4 5 6 on the right side.

The 9 marbles are all uniform in size appearance and shape. One of the bags contains only marbles weighing nine grams each. You have access to a balance scale containing 2 trays you may use the balance 2 times. Given a scale how could you tell which jar had the contaminated pills in just one measurement.