Which of these are propositions? what are the truth values of those that are propositions?

a) do not pass go.
b) what time is it?
c) there are no black flies in maine.
d) 4 + x = 5.
e) the moon is made of green cheese.
f) 2 n ≥ 100

c) There are no black flies in Maine -> False

e) The moon is made of green cheese -> False

Explanation:

A proposition is a statement that poses an idea that can be True or False.

Do not pass go, is not a proposition is an order, and there is not an answer to that statement.What time is it? Is not a proposition is a question and it's response goes beyond True or False. There are no black flies in Maine is indeed a proposition because is a statement that can either be True or False. 4 + x = 5 is not a proposition because is a statement with an infinite number of answers, in contrast, 4 + 1 = 5 is a proposition because is either True or False. The moon is made of green cheese is a proposition because is a statement that can either be True or False. 2 n ≥ 100 is not a proposition because is a statement with an infinity number of answer and is not clear whether is True or False, in contrast, 2 ≥ 100 is a proposition because is either True or False.