The mean average of three numbers is 8. two of the numbers are 11 and 7. what is the third number? 7 8 or 6

This race was first held in 1953 on august 16th. every decade the race finishes with a festival. how many years is this?

It took alice 5 5/6 hours to drive to her grandparents' house for . on the way home, she ran into traffic and it took her 7 3/8 hours. how much longer did the return trip take? write your answer as a proper fraction or mixed number in simplest form. the trip home took __hours longer. ?

What is the least common multiple for 6 and 8? what is the least common multiple for 4 and 12 ? what is the least common multiple for 11 and 12? what is the least common multiple for 3 and 6?