13'x13' = 169 square feet
You will need 25, 13x13 tiles.
There is one and only one real solution, and no imaginary solutions, of the equation x13 = 1. The solution is x = 1. If x = -1 then x13 = -1, so that does not work. If x = i, then x13 = -i, so that does not work. If x = -i, then x13 = -i, so that does not work.
It is 94 = 6561
169?
12x12=144 13x13=169 14x14=198 170 is close to 13x13 but less than 14x14
13x13=169
13x13=16913
12 multiplied by 13 is 156.
1 x13 =13
The product of 18 and 13 is 234
The prime factors of 169 are 13x13.