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'.
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Question: Problem: what is the least whole number that should be added to 784839 if it is to be divisible by 10 ? 
Options: a ) 3 , b ) 2 , c ) 1 , d ) 5 , e ) 6

Answer: c


Question: Problem: a & b started a partnership business . a ' s investment was thrice the investment of b and the period of his investment was two times the period of investments of b . if b received rs 4500 as profit , what is their total profit ? 
Options: a ) 28000 , b ) 30000 , c ) 31500 , d ) 34000 , e ) none of these

Answer: c


Question: Problem: n 10 years , a will be twice as old as b was 10 years ago . if a is now 9 years older than b the present age of b is 
Options: a ) 22 , b ) 897 , c ) 268 , d ) 20 , e ) 48

Answer:
e