DAY 432

GO FORTH AND MULTIPLY
Credit: GAMES Magazine
May/June 1980

Using each of the ten digits once, can you find two five-digit numbers with the largest possible product?

HINT:
The intuitive answer 98,765
                               x 43,210 is not correct.

Answer:

Use two principles, namely, the largest digits go to the left; and, the product of two numbers will be maximized if their difference is as small as possible.

The solution is 96,420
                       x 87,531