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'.

Problem: how many 3 - digit numbers are divisible by 6 in all ? 
Options: a ) 149 , b ) 150 , c ) 151 , d ) 166 , e ) none
b

Problem: in a division , a student took 72 as divisor instead of 36 . his answer was 24 . the correct answer is - 
Options: a ) 42 , b ) 32 , c ) 48 , d ) 28 , e ) 38
c

Problem: what is the total number of positive integers that are less than 200 and that have no positive factor in common with 200 other than 1 ? 
Options: a ) 60 , b ) 70 , c ) 80 , d ) 90 , e ) 100

c