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'.

[EX Q]: Problem: find the ones digit of 73 ^ 356 
Options: a ) 1 , b ) 5 , c ) 6 , d ) 7 , e ) 9
[EX A]: a

[EX Q]: Problem: a number whose fifth part increased by 7 is equal to its fourth part diminished by 7 is ? 
Options: a ) 160 , b ) 180 , c ) 200 , d ) 280 , e ) none
[EX A]: d

[EX Q]: Problem: the sum of the non - prime numbers between 50 and 60 , non - inclusive , is 
Options: a ) 263 , b ) 293 , c ) 323 , d ) 353 , e ) 383
[EX A]:
e