To calculate \( 18 \mod 5 \):

1. Divide 18 by 5: 
   \[
   18 \div 5 = 3 \text{ (quotient)}
   \]

2. Multiply the quotient by the divisor: 
   \[
   3 \times 5 = 15
   \]

3. Subtract this result from 18:
   \[
   18 - 15 = 3
   \]

Thus, \( 18 \mod 5 = 3 \).

Would you like more details on modular arithmetic?

Here are 5 related questions:
1. What is \( 27 \mod 4 \)?
2. How does modular arithmetic apply to clock time calculations?
3. Can you explain the relationship between division and the modulus operation?
4. What is the result of \( 45 \mod 6 \)?
5. How can modular arithmetic be used in cryptography?

**Tip:** In modular arithmetic, the result is always a non-negative integer less than the divisor.

Learn how to calculate 18 mod 5 with a detailed step-by-step solution. Understand the key concepts of modular arithmetic, including division and remainder, suitable for students in Grades 6-8. This problem covers how to use the division algorithm to find the modulus.

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