What is the fifth term in the arithmetic sequence defined by the explicit formula an=6n−4?

An means the value at the nth place. So the first would be 6(1) - 4 which would be 2. Not, you simply need to plug in 5 for n. Which makes your solution;

a5 = 26

So 26 if the 5th term

2,4,5,8,10 are divisible by 40