In this task, you need to answer the given multiple-choice question on the gain. Gain is the value by which to multiply the input. Classify your answers into 'a', 'b', 'c', 'd', and 'e'.
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Question: Problem: if each edge of cube increased by 10 % , the percentage increase in 
Options: a ) 21 , b ) 22 , c ) 25 , d ) 19 , e ) 15

Answer: a


Question: Problem: sam invested $ 1000 @ 20 % per annum for one year . if the interest is compounded half yearly , then the amount received by sam at the end of the year will be ? 
Options: a ) $ 1542 , b ) $ 1145 , c ) $ 1210 , d ) $ 1642 , e ) $ 1020

Answer: c


Question: Problem: a sum of money at simple interest amounts to rs . 840 in 3 years and to rs . 854 in 4 years . the sum is : 
Options: a ) 647 , b ) 798 , c ) 654 , d ) 847 , e ) 976

Answer:
b