unemployment
A river strating with X in Brazil is Xingu.xingu
Yes, the word "Brazil" is a proper noun referring to the country in South America. It is not a common noun that refers to a general class or group of items.
Ordinary.
problem
A word problem that involves common multiples could be, "Whatare the common multiples of 10 and 15?"
Yes, the word problem is a noun, a singular, common, abstract noun; a word for a thing.
common
Ordinary?
A common noun is a general word for any person, place, or thing.Examples of common nouns that start with"q" are:quadranglequailqualityquartquarterqueenquestquestionquietquillquiltquorumquotaquote
The most common word would be Upsilon, although there are others.
Bear, bottle, baby, bat, back.
No, problem is a noun; a singular, common, abstract noun, a word for a situation, a thing.