In this task, you need to provide the correct option for a given problem from the provided options.
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Question: Problem: the ratio between the present ages of a and b is 3.5 : 3 respectively . the ratio between a ' s age 4 years ago and b ' s age 4 years hence is 1 : 1 . what is the ratio between a ' s age 4 years hence and b ' s age 4 years ago ? 
Options: a ) 14 : 4 , b ) 13 : 0 , c ) 15 : 11 , d ) 13 : 12 , e ) 13 : 17

Answer: c


Question: Problem: what number has a 150 : 1 ratio to the number 2 ? 
Options: a ) 130 , b ) 300 , c ) 200 , d ) 30 , e ) 75

Answer: b


Question: Problem: how many zeros does 500 ! end with ? 
Options: a ) 201 , b ) 240 , c ) 124 , d ) 125 , e ) 180

Answer:
c