If 5A72B is divisible by 11, then what is the value of B - A?
Show answer & explanation
Correct answer: C
Explanation
The correct answer is option 3 i.e. 1.
Sum of the digits at odd places = B + 7 + 5 = B + 12
Sum of the digits at even places = 2 + A = A + 2
Difference = (B + 12) - (A + 2) = B - A + 10
B - A + 10 = 11
⇒ B - A = 11 - 10 = 1