What is 51 percent of 492?   10.36   None of the choices   250.92   Bob just got his driver's license and now he has to drive his brothers and sisters to and from school. If the ratio of brothers to sisters is 4 to 1 and he has 3 sisters, then how many brothers does Bob have?   4   12   6   What is 15 percent of 200?   25   30   15   If there are 16 students and 2 teachers, what is the ratio of students to teachers in the class?   8 to 1   16 to 2   1 to 8   Bill is 4 years older than Jill and 2 years younger than David. If Jill is 12, then what is the percent of years she is older than David?   None of the choices   18 to 12   9 to 6