In this task, you need to answer the given multiple-choice question on the general math. Classify your answers into 'a', 'b', 'c', 'd', and 'e'.
--------
Question: Problem: when greenville state university decided to move its fine arts collection to a new library , it had to package the collection in 20 - inch by 20 - inch by 15 - inch boxes . if the university pays $ 1.20 for every box , and if the university needs 3.06 million cubic inches to package the collection , what is the minimum amount the university must spend on boxes ? 
Options: a ) $ 255 , b ) $ 275 , c ) $ 510 , d ) $ 612 , e ) $ 2,550

Answer: d


Question: Problem: if 1 + 3 = 10 ; 3 + 5 = 52 ; 5 + 7 = 174 then 7 + 11 = ? 
Options: a ) 354 , b ) 225 , c ) 654 , d ) 741 , e ) 464

Answer: e


Question: Problem: how many 7 in between 1 to 80 ? 
Options: a ) 18 , b ) 20 , c ) 22 , d ) 23 , e ) 24

Answer:
a