Principle Of Addition and Multiplication: Problem 2

2 years ago
6

Problem: How many three digit numbers satisfy the following conditions:
1. After flipping the order of the digits around and subtracting it from the original number, the difference is greater than 0.
2. After flipping the order of the digits around and subtracting it from the original number, the difference is a multiple of 4.

Key: Think about possibilities

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