Question

What number is 900 more than the greatest possible 4-digit even number that can be made using the digits 1, 4, 2, and 5?

Answer 1

To make it even, the last digit has to be 4 or 2.
To make it the largest, it has to start with 5.

5412 is the largest even? Can you make a larger?

Answer 2

I'not sure.