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: a dog is tied to a tree by a long nylon cord . if the dog runs from the due north side of the tree to the due south side of the tree with the cord extended to its full length at all items , and the dog ran approximately 30 feet , what was the approximate length of the nylon cord e , in feet ?
Options: a ) 30 , b ) 25 , c ) 15 , d ) 10 , e ) 5

Answer: d

Question: Problem: how many positive integers less than 100 have a remainder of 6 when divided by 13 ?
Options: a ) 2 , b ) 7 , c ) 6 , d ) 9 , e ) 10

Answer: c

Question: Problem: the simple interest on a sum of money will be rs . 400 after 10 years . if the principal is trebled after 5 years what will be the total interest at the end of the tenth year ?
Options: a ) 800 , b ) 3799 , c ) 1200 , d ) 2693 , e ) 1732

Answer:
a