Which element in Group B can be added to Group A? Why?
Group A: Iridium, Vanadium, Xenon, Lanthanum, Carbon, Dysprosium
Group B: Radon, Barium, Uranium, Platinum, Manganese, Phosphorus
The first letter of each element in Group A is a Roman numeral. Thus, Manganese can be added to Group A.
Today's brain teaser courtesy of Braingle.com.