April buys a $120,000 condo with an 20-year 3.75% interest-only loan. How much will she owe on the condo at the end of five years?

Answer 1

explain what you mean by an "3.75% interest-only loan"

Interest loans on mortgages are usually stated as annual rates, compounded monthly,
since the common time for the payment period is the month.

Answer 2

If I am correct, an interest-only loan requires payments only of the accruing interest. So at the end of any time span, the balance owed is still the original $120K

Better review the topic to make sure this is so.