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'.

[Q]: Problem: a collection of books went on sale , and 2 / 3 of them were sold for $ 2.25 each . if none of the 40 remaining books were sold , what was the total amount received for the books that were sold ? 
Options: a ) $ 160 , b ) $ 150 , c ) $ 280 , d ) $ 200 , e ) $ 180
[A]: e


[Q]: Problem: the greatest number which on dividing 1657 and 2037 leaves remainders 10 and 7 respectively , is : 
Options: a ) 123 , b ) 1 , c ) 235 , d ) 305 , e ) 505
[A]: b


[Q]: Problem: a student chose a number , multiplied it by 2 , then subtracted 140 from the result and got 102 . what was the number he chose ? 
Options: a ) 90 , b ) 100 , c ) 120 , d ) 160 , e ) 121
[A]:
e