What do all of these number have in common
3,5,7,11,13

What is the measure of the smallest angle in the diagram? 15 29 32 45

Which shows the correct solution of the equation 1/2a+2/3b=50, when b=30?

Some boys and girls were asked if they had a pet. one third of the group were boys. there were 20 boys. 20% of the girls had a pet. boys with a pet : girls with a pet = 1 : 5 i need to know how many girls there are.