Which sentence uses the words loose and lose correctly? did you lose your loose tooth yet? the rope was so lose around the calf’s neck, it looked like the rancher was going to loose it. the circus animals were on the lose, and it looked like the clowns were going to loose their minds.

"Did you lose your loose tooth yet?" Is used correctly.
"The rope was so lose around the calf's neck, it looked like the rancher was going to loose it."Incorrect because when they say 'lose', 'lose' means to get something lost. The two 'lose and 'loose' should be switched around their places.
"The circus animals were of the lose, and it looked like the clowns were going to loose their minds." Again, incorrect. The two similar words should be switched around from their places.

I hope this helped!

The first one is correct
The second should be-The rope was so looseit looked like the rancher was going to lose it.
The third -they were on the loose
The last-the clowns were going to lose their minds