10 Marbles Riddle

2 9 10 11 is heavy.

10 marbles riddle.

Proceed as in the step above but the marble you re looking for is the light one. With a scale you have to figure out how to figure out which bag contains the 9 ounce marbles. But you have to follow the following rules. 3 you are allowed to use set the scale twice in total.

2 8 of them are exactly the same weight. 1 you have 9 marbles as seen. You don t know which is which. 9 bags contain 10 ounce marbles.

If they balance 11 is the heavy marble. In other words you get to take 2 measurements or comparisons here. The scales are of the old balance variety. If a black marble comes out you know that has to be the black marbles box so you put the black label on it.

If not the heavier one is the heavy marble. One of the 12 marbles is irregular but you don t know whether it s heavier or lighte. 3 9 10 11 is light. In any case on to the riddle.

Here is an interesting riddle involving 12 marbles and a balance scale. You can use a scale you can use an empty sack. The one labeled both. Since you know that the box is labeled incorrectly it must have all black marbles or all white marbles.

That is a small dish hangs from each end of a rod that is balanced in the middle. There are 10 bags of marbles. In this case you know that the different marble is 9 10 or 11 and that that marble is heavy. 1 bag contains 9 ounce marbles.