A Problem.--“Something you can’t find out.”
Hypotenuse.--“A certain thing is given to you, or it means let it be
granted that such and such a thing is equal or unequal to something
else.”
“If there are no units in a number you have to fill it up with all
zeros.”
“Units of any order are expressed by writing in the place of the
order.”
“A factor is sometimes a faction.”
“If fractions have a common denominator, find the difference in the
denominator.”
“Interest on interest is confound interest.”