a and b are positive integers less than or equal to 9. If a and b are assembled into the six-digit number abab, which of the following must be a factor of abab?  Choose the correct choice from the following
A) 3 B) 4 C) 5 D) 6 E) none of the above
4848 when divided by 3 gives the result 1212   CONCEPT: Rule of Divisibility of 4 isIf sum of the digits of the Number is divisible by 4 then the number will be divisible by 2   SUm of the digits of No. 4848 is 27 which is divisible by 4 hence the Number 4848 will be divisible by 4   4
<result>B</result>
a and b are positive integers less than or equal to 9. If a and b are assembled into the six-digit number abab, which of the following must be a factor of abab?