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: 123 : 36 : : 221 : ? 
Options: a ) 52 , b ) 69 , c ) 72 , d ) 25 , e ) 32
[EX A]: d

[EX 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
[EX A]: b

[EX Q]: Problem: if n = 7 ^ 11 – 7 , what is the units digit of n ? 
Options: a ) 0 , b ) 1 , c ) 4 , d ) 6 , e ) 8
[EX A]:
d