Ms. Cole teaches math in three levels of classes in her school. There are four times as many students in Ms. Cole's fourth-level math class as in her sixth-level math class. The number of students in her seventh-level math class is twice that in the fourth-level math class. If Ms. Cole's sixth-level class has 40 students, how many math students does Ms. Cole teach?
Step-by-step reasoning:
520
Since Ms.

Cole's sixth - level math class has 40 students and four times as many students in her fourth - level class, there are 4 * 40 = 160 in her fourth - level math class.

For the two levels, Ms.

Cole teaches math to 160 + 40 = 200 students.

If the number of students in her seventh - level math class is twice that in the fourth - level math class, then she teaches 2 * 160 = 320 students in the seventh - level math class.

Ms.

Cole teaches 320 + 200 = 520 math students in the school.

.

The answer: 520