If 638521 is to be divisible by 5, what is the least whole number that should be added to? Choose the correct choice from the following: A) 8 B) 7 C) 5 D) 4 E) 3
A number is divisible by 5 if the last digit is either 0 or 5.   Here, 638521=1(last digit is neither 0 or 5).   the next multiple of 5 i.e to make the last digit 0 or 5 add 4   4 must be added to 638521 to make it divisible by 5   4
<result>D</result>
If 638521 is to be divisible by 5, what is the least whole number that should be added to?