Problem: Mary had two children. Her firs born was named Bill and was normal, and her second child was named Sam and had Down syndrome. Which child didn't have a degree of mental retardation?

A: Bill

Problem: Two neighboring towns from Texas produced their food in different ways. Silver town was sustainable and didn't use any fertilizers or pesticides, while Gold town did. Which town caused fewer algae to grow out of control?

A: Silver

Problem: John is learning about different states of matter. So far, he recognized three states of matter, state A, state B, and state C. State A is in solid state. State B is in liquid state, and state C is in gaseous state. He needs to learn more about their individual characteristics. Would state B have higher or lower pressure than state C?

A: higher

Problem: Dan and Joe studied animals for biology class. Joe had to study predator animals, while Dan studied herbivores and grazers. Which student learned less about rabbits?

A:
Dan