Which of the following must be an integer if the integer x is divisible by both 28 and 21?  Choose the correct choice from the following options.
A) x/252  B) x/84  C) x/126  D) x/108  E) x/81
the integer has to be multiple of LCM of 28 and 21, which is 84..   so x/84 will be an integer   ans x/84
<result>B</result>
Which of the following must be an integer if the integer x is divisible by both 28 and 21?