The mean weight of six wrestlers is 152 pounds. If the weights of the first five are 151, 153, 155, 149, and 153, what is the weight of the 6th wrestler?

The name of what type of image was taken from the Greek words "holos" meaning "whole" and the "gramma" meaning "thing written." It's the form of tech that allows us to "see" a 3D image of something that is actually somewhere else.

What type of sentence is used to give a command or give directions or instructions? An example would be, "Answer the question."

What is the average of 4 and it's reciprocal?

Alchemy was a Middle Ages early type of science where they tried to make cure-all potions, immortality elixers, and a way to turn everything into gold. They couldn't do it, but they did start what real branch of science.

In the 16th century, a huge graphite deposit was discovered in England. The pure graphite was sawn into sheets and then cut into narrow square rods that were inserted into hand-carved wooden holders. What had been invented?

The symbol for Soviet communism included a sickle that indicates the peasantry and what implement that indicates industrial laborers?