In a class where there are as many girls as boys, 2/5 of the boys and 1/2 of the girls went to a local fair. what fraction of the students in the class did not go to the local fair?

The answer is 1/10 of the class did not go to the local fair. Solution: 2/5 + 1/2 = 9/10 10/10 is the fraction of all the students, both those who go and did not go. 10/10 - 9/10 = 1/10

The 8th term is 512