SOLUTION: Using the digits 1 through 9 exactly once, subtract two 3-digit numbers using no remainders, so 738-542 = 196 is nice but uses remainders.

SOLUTION: Using the digits 1 through 9 exactly once, subtract two 3-digit numbers using no remainders, so 738-542 = 196 is nice but uses remainders.

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Question 1196406: Using the digits 1 through 9 exactly once, subtract two 3-digit numbers using no remainders, so 738-542 = 196 is nice but uses remainders.
Answer by ikleyn(52909) (Show Source): You can put this solution on YOUR website!
.

Your example, 738-542 = 196, does nicely work, for example, in the ring of integer numbers modulo 196,

since in this ring 196 is exactly zero.

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