Posted by **Hero** on Wednesday, October 30, 2013 at 5:05pm.

What size rectangular floor can be completely covered by using only 3x3 or 5x5 ft tiles? You can't cut tiles or combine the two tile sizes.

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**Ms. Sue**, Wednesday, October 30, 2013 at 5:07pm
What are the multiples of 3?

What are the multiples of 5?

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**Hero**, Wednesday, October 30, 2013 at 5:31pm
I still dont understand

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**Ms. Sue**, Wednesday, October 30, 2013 at 5:36pm
Mean you can't tell me the multiples of 3?

3, 6, 9, 12, 15, 18, 21, 24, etc.

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**Hero**, Wednesday, October 30, 2013 at 5:45pm
No, like what the answer is.

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**Ms. Sue**, Wednesday, October 30, 2013 at 6:15pm
3 by 3 tiles:

Rectangular rooms could be

6 by 6

6 by 9

9 by 9

9 by 12

12 by 12

9 by 15

12 by 15

15 by 18

12 by 18

15 by 21

and so on

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