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: if ( 1 – 1.5 ) n = 1 , then n = 
Options: a ) − 400 , b ) − 140 , c ) − 2 , d ) 4 , e ) 400
[EX A]: c

[EX Q]: Problem: 2525 * 9 
Options: a ) 22725 , b ) 25675 , c ) 22655 , d ) 27575 , e ) none of these
[EX A]: a

[EX Q]: Problem: from below option 50 is divisible by which one ? 
Options: a ) 3 , b ) 2 , c ) 7 , d ) 8 , e ) 9
[EX A]:
b