Refer to an 8-Digit Student Id at a Large University

question 10

Short Answer

refer to an 8-digit student id at a large university. The eighth digit is a check
digit equal to the sum of the first seven digits modulo 7.
-Suppose the first digit of the student id X123 4566 is illegible (indicated by X). Can you tell what the first digit has to be?

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Definitions:

Cost Of Goods Sold

The total cost directly involved in producing goods or services, including materials and labor.

Net Income

The amount of money left after all expenses, taxes, and costs have been subtracted from a company's total revenue.

Inflation

The rate at which the general level of prices for goods and services is rising, eroding purchasing power.

Phantom Profits

Profits recorded in the accounting books but not actually realized through cash transactions, potentially leading to a misleading financial condition.