Please keep in mind that this is a research project, and there may sometimes be glitches with the interactive software. Please
let us know of any problems you encounter, and include the computer operating system, the browser and version you're using, and what kind of connection you have (dial-up modem, T1, cable).
In the Fractris game, you will be trying to finish as many rows as
possible using different combinations of fractions. The computer will
start you off with a random fraction and then it will be up to you to
add your fractions to fill up the row exactly to score points.
You will gain more points if you can avoid using the same fraction
To start playing, click on the Run button. You will see a block fall
immediately on the left of the grid. To add to that block, select a
fraction on the right side by clicking on it. You should then see a
block fall into place. Keep adding blocks until you have filled the row. If you fill your row up without using any fraction more than once, it will disappear so you can start a new row. Otherwise, your row will remain and you will start on the next row up. You'll have 250 seconds to finish as many rows as possible!
To play the game again, press the Reset button, then press the Run button.
- If the computer sends down a 1/3 block, how can you finish the row
with the fewest number of blocks and without using the same size block twice?
- If the computer sent down 1/5, would you be able to fill the row?
If so, how could you do it with the fewest blocks? If not, explain why
not and tell how close you could get to completing the row.
- What do all the fractions in the Fractris game (1/2, 1/3, 1/4, 1/6, 1/12, 5/12) have in common?
Bonus: What are all the different combinations of the fractions
1/2, 1/3, 1/4, 1/6. 1/12, and 5/12 that will sum to 1 without using
any fraction twice? Explain how you know that you have found all the