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: 2525 * 9 
Options: a ) 22725 , b ) 25675 , c ) 22655 , d ) 27575 , e ) none of these

A: a
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Q: Problem: find the value of ( 55 + 113 / 78 ) × 78 
Options: a ) 4423 , b ) 4403 , c ) 4413 , d ) 2403 , e ) 4375

A: b
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Q: Problem: find the greatest number which leaves the same remainder when it divides 21 , 57 and 105 . 
Options: a ) 18 , b ) 8 , c ) 12 , d ) 16 , e ) none of these

A:
c
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