Q: 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 had a degree of mental retardation?
A: Sam

Q: Mike was visiting the African Savannah. One animal that interested him most was the African Buffalo. He noticed that the buffaloes would usually live in a large herd, often exceeding few hundreds. He noted that as case A. But sometimes the buffaloes would live in a small herd. He noted that as case B. Interestingly, there are incidents when an aggressive male buffalo would live by itself. He noted that as case C. In which case an individual buffalo would have lower risk of attack, case A or case B?
A: case A

Q: Two nearby villages are experiencing earthquakes. Bow village gets a lot of earthquakes annually, while Arrow village gets only a few. Which village gets less convection within the Earth?
A: Arrow

Q: David is a physicist. He teaches school children how matters and energy work. One day he was teaching them about two particles of matter, particle A and particle B. Particle A moves faster, but particle B moves slower. He was showing the children about different characteristics of moving particles. Which particle would have lower temperature, particle A or particle B?
A:
particle B