Take Any Three-Digit Integer, Reverse Its Digits, and Subtract

question 148

Short Answer

Take any three-digit integer, reverse its digits, and subtract. For example, 742 − 247 = 495. The difference is divisible by 9. Prove that this must happen for all three-digit numbers abc.

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Definitions:

Unearned Rent Revenue

Income received by a landlord for rent that has not yet been earned because the rental period has not yet occurred.

Income Statement

A financial report that gives a summary of a company's revenues, expenses, and profits/losses over a specific period, highlighting operational performance.

Balance Sheet

A financial statement that displays a company's assets, liabilities, and shareholders' equity at a specific point in time, showing the company's financial position.

Rental Income

Rental income refers to the revenue received from leasing property or other assets to tenants.