Answer:
I'm not 100% sure love, but I think it would be 12x.
Step-by-step explanation:
10 hours seems like the most reliable answer because it matches up the best
18 minutes because 6*2 is 12 and 3*6 is 18. it will take 6 minutes to do 4 problems, 9 minutes to do 6 problems , 12 minutes to do 8 problems, 15 minutes to do 10 problems, and 18 minutes to do 12 problems
