Movie A was one-fourth the length of Movie B. Movie B was 5 minutes longer than Movie C. Movie C was 1.25 hours. How many minutes long was Movie A?
Movie C = 1.25 hours = 75 minutes.
Movie B = 75 + 5 = 
<gadget id="calculator">75+5</gadget>
<output>80</output>
80 minutes.
Movie A = (1/4) * 80 = 
<gadget id="calculator">(1/4)*80</gadget>
<output>20</output>
20 minutes.
Movie A was 
<gadget id="calculator">20</gadget>
<output>20</output>
20 minutes long.

<result>20</result>