Problem: Insect:

The thoracic segments have one ganglion on each side, which are connected into a pair, one pair per segment. This arrangement is also seen in the abdomen but only in the first eight segments. Many species of insects have reduced numbers of ganglia due to fusion or reduction. Some cockroaches have just six ganglia in the abdomen, whereas the wasp Vespa crabro has only two in the thorax and three in the abdomen. Some insects, like the house fly Musca domestica, have all the body ganglia fused into a single large thoracic ganglion.

How many ganglia are on each side of a thoracic segment?
---
A: one

Problem: Indigenous peoples of the Americas:

About five percent of the population are of full-blooded indigenous descent, but upwards to eighty percent more or the majority of Hondurans are mestizo or part-indigenous with European admixture, and about ten percent are of indigenous or African descent. The main concentration of indigenous in Honduras are in the rural westernmost areas facing Guatemala and to the Caribbean Sea coastline, as well on the Nicaraguan border. The majority of indigenous people are Lencas, Miskitos to the east, Mayans, Pech, Sumos, and Tolupan.

How much of the population of Honduras is of full-blooded indigenous descent?
---
A: About five percent

Problem: Multiracial American:

In the early 19th century, the Indigenous American woman Sacagawea, who would help translate for and guide the Lewis and Clark Expedition in the West, married the French trapper Toussaint Charbonneau. Most marriages between Europeans and Indigenous Americans were between European men and Indigenous American women. Depending on the kinship system of the woman's tribe, their children would be more or less easily assimilated into the tribe. Nations that had matrilineal systems, such as the Creek and Cherokee in the Southeast, gave the mixed-race children status in their mother's clans and tribes. If the tribe had a patrilineal system, like the Omaha, the children of white fathers were considered white. Unless they were specifically adopted into the tribe by an adult male, they could have no social status in it.

Who married Clark?
---
A: unanswerable

Problem: Compact disc:

A CD is read by focusing a 780 nm wavelength (near infrared) semiconductor laser housed within the CD player, through the bottom of the polycarbonate layer. The change in height between pits and lands results in a difference in the way the light is reflected. By measuring the intensity change with a photodiode, the data can be read from the disc. In order to accommodate the spiral pattern of data, the semiconductor laser is placed on a swing arm within the disc tray of any CD player. This swing arm allows the laser to read information from the centre to the edge of a disc, without having to interrupt the spinning of the disc itself.

What does the width of a pit indicate?
---
A:
unanswerable