0
Anonymous
Multiply by 4
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One rule is U1 = 5, Un+1 = 4 * Un.
x4
LCM of 10 32 64 80 is 320.
A 20 x 20 room will have a perimeter of 20 + 20 + 20 + 20 = 80.
A 20-unit square has a perimeter of 80 units.
It is 4/1.