Let $A3BC$ and $DE2F$ be four-digit numbers where each letter represents a different digit greater than 3. If the sum of the numbers is 15902, then what is the difference between the values of $A$ and $D$ ?

Kepler. Discussing PYQs. Q.no. 16

Let A3BCA3BCA3BC and DE2FDE2FDE2F be four-digit numbers where each letter represents a different digit greater than 3. If the sum of the numbers is 15902, then what is the difference between the values of AAA and DDD ?