Kadaris completed his math homework in 1/3 of an hour.

He had to complete 4 math problems.
He spent an equal amount of time on each problem.
How much of an hour did Kadaris spend on each problem?
12
1/7
3/4
1/12

The correct answer is 1/12. Since Kadaris completed his math homework in 1/3 of an hour and had to complete 4 math problems, he spent 1/3 รท 4 = 1/12 of an hour on each problem.