One of 3 balls is either lighter or heavier than the rest.
The task is to find it in only 2 weighings.
The activity expands to 6, 9 and finally 12 balls all in 3 weighings.
| Version | 23 |
|---|---|
| Works with | Sugar: 0.82 – 0.96 |
| Updated | January 5, 2012 |
| Developer | mulawa1 |
| Rating | Rated 1 out of 5 stars 1 review |
| Downloads | 3,370 |
More about this activity
The balls are colour coded but only on the FIRST weighing:
* red for balls in the pan that went down;
* gold for balls in the pan that went up;
* green for normal balls;
* blue for balls that we know nothing about.
Left click on a ball to pick it up (but only after the first weighing), left click to put it down.
Right click on a ball to toss it to the right.
When you have identified the rogue ball, drop it in the left barrel if you think it is light, the right barrel if you think it is heavy.
Reviews
Feedback from testing
It would be useful for the "more about this activity" information to be in a Help button in the activity in case the students are working offline.
Explain the scoreboard in the Help.
Label the buttons please. Maybe move the restart button to the top of the screen to be less cluttered and more clear.
Can it automatically restart when you win?
Nice challenge with the different levels, thanks.
Rated 1 out of 5 stars by Tabs on January 27, 2012
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