1.There are 5 boys who played checkers after school.Each boy played for 4 games of checkers
against each other boys.How many checkers were played altogether?
2.Marcie have 3 sets of light.One set stay lit for 11 seconds and then shuts off for 1 second,the second set stay lit for 7 seconds and shuts off for 1 second and the third set stay lit for 4 seconds and shuts off for 1 second.If the 3 sets are plugged in together beginning the lit cycle,after how many seconds will all three sets of light will be off(Not when they go on altogether.