Posted by Hero on .
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.

Math 
Ms. Sue,
What are the multiples of 3?
What are the multiples of 5? 
Math 
Hero,
I still don't understand

Math 
Ms. Sue,
Mean you can't tell me the multiples of 3?
3, 6, 9, 12, 15, 18, 21, 24, etc. 
Math 
Hero,
No, like what the answer is.

Math 
Ms. Sue,
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