The number has 6 the value of the smallest digit is 0. the value of the largest digit is 8, the digit in the tens place is 2 less than the digit in the hundreds sum of the digit in the tenths place has the same value in every remaining digit is the largest even what is the mystery number? pls

The digit in the tens place is 2 less than the one in the hundreds place.  But when you add them together, they total 8, which is the digit in the thousands place. Therefore A is 5 and B is 3.   In the tenths place, the digit has the same value in every place.  The only digit that works here is 0, which is worth 0 no matter where in the number it is placed.
Remaining digitis largest even digit, which is 8.
The answer is 8538.01