He is forty years old.
he is forty.
he is forty of age.
which one(s) is/are correct?

"he is forty(40) years old"and "he is forty(40)"

He is forty years old because forty is an age, therefore you must put that it is an age, otherwise one would think you are calling him the number forty. He is forty years old. By saying he is just forty, it sounds like that is his name. He is forty of age does not make sense.

question 1: d) the old man continued, "in the long run, what people think about shepherds and bakers becomes more important for them than their own destinies.'"

question 2: d) by providing a different perspective and encouraging the englishman to never give up, the boy him to discover the alchemist.

question 3: c) the stones he gave santiago the boy to recognize omens, which will him on his journey to find his personal legend.

question 4: d) when the englishman wants to quit, santiago doesn’t allow the englishman to give up.

question 5: a) by instructing the englishman to go and try, the englishman is motivated to continue on his journey toward his personal legend.

explanation: